What options are out there?
Very few people using Signal, a few people on iMessage (a group chat or two, plus a few key people)
Everyone else is on WhatsApp
I also have Slack for communities, IRCCloud, Ivory for Mastodon and BlueSky.
iMessage - 10% for friends who refuse to install telegram
Whatsapp - 5% for video calls. Surprisingly Telegram video call quality degraded over last 4-5 months for users in USA. So now I have to use facetime + whatsapp combo
Misc - 5%
Telegram is years ahead of the rest by user experience and features.
It doesn't matter what options are out there. People aren't going to bother.
Also have to use whatsapp once in a while because some relatives and friends prefer familiarity to quality.
Skype for my late friend Ward, and my other friend Jim
I get the occasional message when I'm logged into Facebook through the web.
Family and IRL friends use WhatsApp.
Slack for work
Telegram for apartment community
email for very very close friends
iMessage for those using ios