Your original question was about "personal conversations". I don't think all personal conversations fall into the category of things I wouldn't write down. If I remember that I need to ask my coworker about dietary restrictions for going out together on the weekend while we are talking about our db problems, I won't necessarily switch to Signal for that.
Then we misunderstood each other. In that case there is no need to change platforms at all -- no one is ever going to penalize you for talking about dietary restrictions or similar topics. If you want to talk about looking for jobs, how much you hate your wife, or what an asshole your boss is, that should obviously not be done in a way that it could ever be traced to you. Failing to do that makes the situation at least half your fault, what did you expect?
