I mostly use Facebook for posting tiling/tesselation art in a moderated speciality group (https://www.facebook.com/groups/tiling) that has 72,000 people in it. There are some really nice speciality groups you don't find anywhere else. Facebook's UI is horrific for comments, I think even a bad AI design couldn't be much worse, but the comments are generally pleasant.

I check my regular facebook friends occasionally, but not very often. I ignore everything else.