A lot of the younger generation has never been into facebook anyway. However, they are into things like snapchat and instagram (owned by facebook). Personally, I still use facebook a lot to keep in touch with friends and family because virtually everyone I know (except for my kids) has an account. It's not exactly the kind of communication that is likely to be censored though.

You have to look at any centrally controlled platform as a platform that could be censored in the future even if it isn't now. Always backup your own data. I feel bad for the idiots who upload their videos to youtube, don't bother to keep their own backups and then have their account deleted because of some random bullshit reason.