I have all important personal contacts on SimpleX. Then I have around 250 people on Signal that are not that close, but also not strangers.

Usually people already use between 2 and 4 messengers. Cut ties with people that can not be bothered to protect their conversation with you. Their neglect will harm you. It's a form of passive aggression and abuse. Time to face that we need to ressonate with people to accomplish our lives.