Just a quick follow-up to say that I got tired of waiting for this to be implemented fully in SVG import, so I solved the marker ending issue myself with some good ol' trig and an added SVG line element. Now my application can spit out SVG with marker-like line endings that automatically orient to the vector of the parent line, and have it look perfect when imported in Illustrator. Thanks for nothing, Adobe.

Aaaand... STILL not working in 25.4.1. Unreal. Is this because COVID has decimated development, and there just isn't anyone woking on SVG import anymore?

STILL not working in 25.0.1. Sigh....

And STILL not working in Illustrator 2021 (25.0). As far as SVG import goes, this would seem like a very trivial fix. But apparently it's an extremely difficult thing to accomplish, not deleting the object that a marker is targeting. Disappointed, to say the least.

I was going to add this specific bug (even though there is an umbrella feature request for complete SVG import support), but I see here that it had already been reported a year ago. This issue is prohibiting me from implementing what I need in my astronomical charts, which is the ability to use marker-end styles to put special caps on the ends of certain paths. Still not working in Illustrator 24.3. Sigh....

Since one year? This bug looks quiet trivial to me..

Thank you so much, this works like a charm! You really saved me :)

Thanks!
I found another workaround via svg to pdf conversion using inkscape command line:
inkscape -D --export-type=pdf --export-ignore-filters name.svg

I know a really, really ugly and annoying workaround...
I copy the SVG and remove all "<marker>" from the def section at the bottom (in my favourite text editor). By doing this, the paths are showing up again in Illustrator. Afterwards, I copy the arrow heads from the original file into this new file (also in illustrator).
As I said. Ugly and annoying. But I don't have another solution for this either.

Still not working in MacOS 10.15.5 and Illustrator 24.1.3. IF you know a workaround, please let me know.

Still doesn't work in the current version of CC 2020 (Windows 10). Markers are a basic feature of SVG since 2011 and they are supported by every browser (even IE!) You should really fix this issue.

MacOS Mojave 10.14.6
Illustrator CC 2019

1. rename the attached .txt file to .svg and import the SVG file into Illustrator.

expected result: Illustrator should display a line with an arrow at the end.
actual result: Illustrator displays only the arrow at the end.

also attached: image of problem behavior.

removing the marker-end attribute from the path in question will display the line.