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.
You should really search, I tried to compile all I could find, but I'm here to stop using tg, not going back to tg and scroll Russian opposition channels for all the mentions of stuff like that
There are some articles in English that describe the events, but most of them are in Russian
Also, from the search it's really hard to find anything because a lot of stuff about the war
Here are a few topics:
Compilation of different technical vulnerabilities and issues of telegram(in Russian):
And in general, Russian government unbanned tg after it realized it can read it. I wouldn't trust anything that was unbanned in Russia or China
And one more article that lists issues of telegram: https://emisare.medium.com/так-ли-безопасен-telegram-f5a3128a1311
I'm already tired of doing this, I didn't even start on activists and how they get hacked and stuff
There was just a fine on telegram yesterday for not "complying" with Russian authorities which is another proof they are doing great. https://tass.ru/obschestvo/20188921