Earlier quoted context omitted.
The feed certainly is, but I suspect most activity left on Facebook is happening in group pages. Groups are the only thing I still log in for as some of them, particularly the local ones, have no other way of taking part. They are also commonly membership by request and actively moderated. If I had the time (and energy) I might put some effort into advocating to moving to something else, but it will be an uphill batt…
I stopped going on facebook a few years ago and don't miss it; I don't even need messenger as everyone migrated to whatsapp (yes I know, normal people don't want to move to signal, but got quite a few techy friends to migrate). The FB-only groups are indeed a problem, I'm delegating them to my wife. IF I ever had to go to FB for anything, I'd probably install a wall-removing browser extension. Mobile app is of course…
You’ll probably find you can no longer make an account. I’m in the same boat as you (not used and haven’t missed in over a decade), however, my partner needed an account to manage an ad campaign for a client and neither of us were able to make one. Both tried a load of different things and, ultimately, gave up. Had to tell the client what they needed over a video call