Okay if you have more than one layer...let's say 50 and I need to select 20 of them. Why can't someone select them with a single click instead of selecting every single layer? With shift selected I can mark more than one but they aren't selected. Same thing for sublayers and so on.

Given that Photoshop can group layers into folders, illustrator should have the same capacity to bring the experience closer together.

It would allow for greater flexibility when editing artwork.

Have the ability in Layers palette to create "New layer from selection" or "New layer from artboard"

Example from Xara Designer.

I'd like to paste on multiple layers simultaneously - e.g. copy someting, select certain layers, ctrl + alt + v pastes it on all selected layers -> that would be helpful for multi-language files.

Would love to have the possibility to delete unused layers in Illustrator (like you can delete unused colors very quickly).

e.g. when you have 100 layers and only 10 layers have objects on them, but you don't want to delete every layer manually

I would love to be able to skip the Layers tab on the fly and right-click an object to move it to any layer in the document. It seems like it would make the most sense for this to live in Arrange? Ideally, the layer list would include colored bullets to match layer labels. This would be a huge time-saver for me.

Allow us to right-click in the layer window. Photoshop has had it for ages, why doesn't Illustrator?
Overall I would like it to be more like the layer window in Photoshop i.e. a Transparency option, better drag and drop and Groups.

When pasting from Indesign to Illustrator it would be very handy if there was a remember way to keep layers intact instead of flattening them onto one layer? Maybe a dialogue box that just okays the action?

Currently, you cannot select one object and expand the selection to the entire layer, the existing "Select > Object > All on same layers" selects the parent layers as well.
In case objects have different appearances, but reside on the same sublayer, it is much easier to select one object than to search for the appropriate layer in certain situations (especially on large files).

Add functionality like the view (eyeball ) icon cursor- as you drag down the list in the selection column of the layers menu, the cursor goes into "paint brush" mode and continues to select or deselect items. Also add "Select all objects and groups on highlighted layers or sub layers" to the dropdown function menu.

we are creating layouts for franchisees and because many time they unlock the layers and moving around the elements, we thought that locking the layer and protecting the content with the password could be the solution to maintain integrity in the layout designed from the agency

Is there any setup I can do in AI that when I click on the EYE icon at the Layer, the layer is getting selected by that? It is very inconvenient for me to open the eye and then the layer again to activate it...

Layers would speed up to workflow when you don't have to switch workspaces so often.

Tap or rotate gesture for rotate to original view would also speed up the workflow.

Being able to pin a certain layers which I use alot to the top of the stack would be useful to me. Would save scrolling to find those layers.

When new layers are created, pinned layers would still appear at the top. 😁

On fixing the hierarchy of layers.

In data with a large number of layers, such as a map, the vertical relationship and stacking order of objects is very important. We are very careful not to make mistakes, but there are times when our hands slip and we end up moving them.
At the moment we can lock objects, but we can always manipulate the vertical relationship of objects.
If there is a lot of demand for the ability to lock the vertical relationship other than mine, I would like to see improvements.

Hello, it would be nice if you could change the opacity of a layer without a mask. I like to draw the shadows with the Blob Tool and have to reduce the opacity of each path after each step. It would be easier if each path automatically had a previously set opacity. Alternatively, you could make this setting in the options of the tool itself. Thank you
Gabi

Illustrator 26.0.1
macOS Big SUR 11.6.1
If I make a new template in the layers panel and try to dim images to a lower opacity — it remains at the same opacity.