Because of an historical presence since 2010, 16K (nice persons) followers that I often meet IRL and are publishing nice comments. There is a little vibrant P&C community over there, that have their dissonance about using Facebook/Messenger, because they have to: for staying in contact with their family, their co-workers, the group of the parents for their child at school, well, a social life.
Same for me, it would cut bridges with family member if I wasn't on it.