Well, user experience is going to depend. Kbin.social recently cut federation temporarily with some instances as a way to work through our backlog. I kind of thought that was up and running again, especially since lemmy.world was listed and I can definitely see that, but I question if this is why beehaw refuses to load and I haven't seen anything from them in a week.
Sh.itjust.works is also listed there, but I have this hunch that they may also fall prey to the same bug in lemmy's default reference nginx config that initially stopped kbin users from accessing the android community when they moved. This and Sopuli.xyz (not listed) are both inaccessible, and it's upsetting watching it wear on because I'm interested in communities in both that either won't federate anything I do or that I can't even find in order to sub. This bug is what bothers me the most, that it's in lemmy's default settings is unacceptable, and it makes kbin appear to have much larger issues with federation than it actually does.
Lemmy.ml apparently removed the block only to put it back, which I was not aware of, increasing the likelihood of bullshittery to 90%. I have to actively filter which communities I can actually participate in instead of only appearing to, and they can just defederate out loud if they're that bothered. It's not like they haven't taken criticism before, I'm sure they'll live.