I’m a fan of self-hosted Matrix server. You can get a dozen of bridges for those stubborn people that refuse to leave messenger/whatsapp/telegram (at a loss of encryption, and they still get your convos, but at least you don’t have their spyware on your mobile and you can have everything in one app), while also being decentralized.

Self-hosting a server is actually really, really easy. It took me like half an hour, because there is an amazing Matrix Ansible Deploy script, that has a pretty easy to follow documentation, and is also one of those super-rare projects that just works. Even if I forgot to update my server for several months, I could literally “just update”, and the script is clever enough to figure out what changed, tell me what I need to update in the config files (which are still only like four rows of stuff I needed to setup), and it is a really smooth experience.