It was a many months transition, and it's finally done
Fun thing, you can actually make a backup of all* your messages, groups, contacts, etc. So before leaving you can have all of your data in case you need that one contact or something
The final red flag was as that allegedly Russian authorities were messing with people's deleted messages. Not for the first time there are news that they could read, modify, delete, see location, and etc. Screw it, this is unsafe, I'm out.
Also, these days telegram is really at the state of a pile of garbage, bloated, buggy, and shady messenger.
Install a family XMPP server like Snikket or otherwise. Show them the benchmarks of how little battery & data plan drain is used from Conversations forks. Explain how bloated Electron apps are & how you don’t wish that on your loved ones vs. Dino, Gajim, or a TUI client. Sidecar a Movim server so y’all can share long-lived, non-ephemeral posts instead of losing memories like photos in some long group thread. Let them know their data is safe with you as the operator instead of some massive for-profit corporation—and if they don’t trust you, they are empowered to start their own server to interop.
(This tactic has yet to work for me, but I will keep running into that wall til it breaks 😃)