Does the IllegalStack plugin help on Paper?

Does IS still help at all on Paper these days? It looks like IS does a lot of the things that Paper does, so I’m wondering if there are any reasons to use it on a Paper server.
Like does it do anything that Paper doesn’t already do?

From what I can tell it looks like it’s more helpful on older Minecraft versions. Not sure if it prevents any exploits on 1.17.1.

On Paper, from what I’ve heard, IllegalStack adds more dupes than it fixes.