I have two Facebook accounts. One using my real name and another using my stage name (for when I get zucced.)
I use Facebook to stay in touch with my Gen X IRL friends and because without it, the "Dank Memes" part of my handle wouldn't apply. I get all my dank memes from FB.
But considering I have even one FB account, why would I care if kolektiva blocks threads?
I also have known for some time that Twitter is a dumpster fire. It was a dumpster fire way before Musk took it over.
I assume that at some point Twitter will try to federate as well.