Well, this is complex one.

As you know, a lot of people live in metric world.
It means they use 'cm-mm' instead of 'inches-points'.
I, for example, have all three major units set to millimeters — general, stroke and type.

But each time I apply brush to anything, it gets weight '0,353 mm'.
Yes, it is 1 point. And every time I need to scale my brush twice as normal, I have to type in '*2' in the end of 'Weight' field instead of just typing 2.

Worse, when I don't remember what weight it has now, but need to change it, knowing it. I have to switch to points for stroke or calculate it somewhere.

Even if I used inches — in fact, you can have fat-wide brush by itself, 10, 53, 0.64 inches or anything, and AI will show it as '1pt', when it's obviously NOT.

Because it's '1x'.
It is relative size, not absolute.
One time as wide as original.

So why won't you change the way this value is shown in Stroke palette?
Let the weight of brushes be measured in relative units across all unit's setting.

Make it an option, please.

First of all — I'm speaking about adding this feature to OLD New dialogue window, because new fancy one is a disaster.

I create new documents with a vision in mind, what will I do and what grid would I use. I'd like to have an ability to set it with defining size of a document.

Next, most new users have no idea about grids and don't understand, why use it. More of it, even intermediate users don't have a clue, and I have to deal with a lot of designs, made by these average designers. All of them can't skip new document dialogue window, and if grid settings would be there, I would less deal with documents created in metric units with a grid set in inches and stuff designed by eye, all with gaps and holes, like attached picture shows. I'm idealist, I know, but still hope people will educate and do less bad design.

Sometimes selection tools fail (seemingly) to pick up object.
For example, if you have an object with fat stroke, clicking to outside part of that stroke will select nothing (or object underneath stroke) — you have to select in/inside edge to do it.
Second example — type object, with an empty descender zone, behind baseline; you click below letters to select an object behind, but pick type object instead.
Third example — object with a subtle but wide drop shadow effect applied to it. Shadow is almost invisible (low opacity and light color), but when you click in it, AI selects object anyway, while you expect to select object behind it.

I guess, it would be nice to have an option (and temp mode as well) for Direct selection tool to pick an object based on visual rather the structure.
You could set a tick in Control panel or hold some modifier key (as Photoshop does, when you toggle auto-select for Move tool).
Then you could pick an object, by clicking in outside part of the stroke, or clicking through letters, or clicking through enough transparent shadows.

Problem Description:
AI can do math in fields and that is awesome.
But I always swear a little when I use angle fields.

For example:
1. Move an art with Move dialogue at 10mm and 360 degrees
2. Select another object and invoke dialogue again
3. Type in '+30' in angle, so it would become '360+30'
4. Press Tab or Enter

Actual Result:
AI says DING (or whatever sound is set for it in your OS) and does nothing

Expected Result:
AI should turn this typed value into '30', that is make one revolution and don't bother me, as a user that he can't handle 390.

It's the brute example with values I can count myself, but imagine I would have 357,47 instead of 360? Why computer can't compute it?

Any Workarounds:
Improve math skills and keep swearing

When links are missing that are on a hidden layer there is no way to easily spot them and check on in multilayered files. Since the GoToLink function only works on active layers, there is no other way but showing ALL layers and then using this function, remembering the layer and then hide the layers again; a painstaking procedure with large multilayered files. Would be nice if the link panel would simply state on which layer the missing link resides. Or make the GoToLink function automatically make the appropriate layer visible, like when pasting onto a hidden layer with 'paste remembers layers' on.

AI is used worldwide. Despite PostScript, based on points, based on inch, being de-facto a standard for most users, many people use metric system.

English inch, as you know, equals exactly 2.54cm.
This gives us, metric users, mantra for translating PPI into PPCM: 254ppi=100ppcm

But if we need lower value, such as 10 or 20 or 30 ppcm (working in scale with huge designs, such as ad bus wraps), we can't use it, because AI doesn't allow to enter fractional values anywhere inside! We can't use 50.8, 25.4, 76.2, Ai would round it to 51, 25, 76.
This will give us wrong result exporting rasters.

That's why, until this change (fractional values) is made, we, metric people, won't have much benefit of large artboards' support you are thinking to implement.
Please, add support for fractional values for resolution everywhere.

Right now we can click OK/Enter every time interrupting warning dialogue pops up, or tick 'Never show again'.
I would prefer background message, same as 'Shape expanded' now appears.
For example, I use Ctrl+J combination to connect all my segments in one closed path. I can have two or more segments, and just press this combination several times to achieve my goal, rather then count how many times I should press it. But when path is finally closed, AI throws a warning at me. Usually my hands press keys one more time after that and AI beeps-blinks, which is awful — I expect this window to know my operation is done, but this is too much — this is no error, this is just awaited inapplicable operation. If AI would just pop up small gray badge 'Path is already closed' (AI knows exactly what I've selected), it would work so much better for me.

Hi,

It would be really helpful for those of us working in low-light environments to have an inverted/low-contrast option for the 'Outline' view.

As it is, working on an all-white screen is very fatiguing. Having a simple switch to change the display from light to dark would be a welcomed QoL improvement.

I've attached two images showing how I see this implemented.

When "invert" is active I'd prefer the background not be pure-black but a dark shade of grey (shown as #1E1E1E here).

Another option could be to make the alternate mode adaptive, where the color scheme matches the users [Preferences / User Interface / Brightness ] setting.

Thanks