I'd like to get my friends and family on Signal or Riot but I can't get anyone to use them. Everyone uses SMS (or talks about using Whatsapp but might or might

I'd like to get my friends and family on Signal or Riot but I can't get anyone to use them. Everyone uses SMS (or talks about using Whatsapp but might or might not actually). I was using Google Hangouts long before Whatsapp or Signal started being taken up and now they assume that's what I'd prefer, like that's how I should be communicated with, even when I'd prefer something else. It's strange.