Or... you could just lock yourself into the top few chat ecosystems that your friends, coworkers, etc. use and be relatively safe because the tide comes in quick for consumer chat systems that people don’t like using.
Right now I have iMessage, Snapchat, SMS, Messenger, GroupMe, Email, Discord and Slack along with a bunch of apps with chat as a feature. I have been caused no harm whatsoever by this setup except that my SO has a way to fill my notification screen when they’re feeling obnoxious.