Added a slug area in document setup
In InDesign's document setup, there are Slug settings in addition to Bleed.
There is no a slug area in Illustrator. As a result, users are stacking another large artboard underneath the artboard as an alternative to a slug area. This situation should be remedied by adding Slug settings.
Egor Chistyakov commented
I wonder how this quite new request was able to gain that much upvote!
Regarding the problem, I do myself publishing in Ai, so sure, slug is needed.
Some users are expanding a bleed area to maintain the correct artboard size. They are unavoidably doing this, knowing that it is bad know-how. Being able to set up a slug area will help them.
The only way to maintain the correct artboard size in Illustrator is to stack other artboard.
With a slug area like InDesign, there is no need to stack artboards.