I'm on Signal (obviously not self hosted) and even if I really wanted to move to another platform be it self hosted or yet another privacy focussed one, I can't ask my friends and family to move to another platform again. I already asked them to move away from WhatsApp, can't do it again..
This is what I told most of my friend when they asked me to move to signal. Is is going to be a very shitty company managed by a shitty egocentric person and you are going to regret. But you will make people move and they won't do it again and won't understand the reasons