It's not fair to the public that FB bought up Insta/Whatsapp. That is a true lack of choice. If it were just FB, fine, ignore it, don't use it, use Whatsapp. But no, they get to buy up competition whilst telling us how much our privacy and integrity is taken seriously

For messaging, I highly encourage people to use matrix.org.

For tech savvy people it's really easy to self-host https://github.com/spantaleev/matrix-docker-ansible-deploy and the good part is that you can set up bridges to telegram, whatsapp, facebook, irc, discord, slack... So you can use those apps privately while waiting for people to switch to better alternatives (which may never happens sadly).

Bonus: the desktop app is a rather lightweight web app usable in browser, so goodbye RAM eating monsters like slack and discord.