I have been barely using FB, but I deactivate my account early 2025 and I never looked back. I never had Instagram or Twitter.
I thought I would miss out on many events, but then I just signed up to a few more newsletters and that's still more events than I have time to vist.
I still wish we had a proper replacement for FB events. At least we have a nice market place platform that everyone uses (willhaben.at). For a long time I didn't even know that FB MarketPlace exists.