I don't have a Facebook account but I do have WhatsApp and Instagram. I'd use a Facebook standalone messenger that didn't require a Facebook account to communicate with those that do if such a thing existed. I closed my FB account a year ago and I don't miss it at all. Sure there are times where someone asks if I saw something and it was only posted to FB but that is so rare now.

I imagine that one day I'd use many Facebook properties without ever encountering the news feed.