I really like Telegram and these features but I don’t use it because they don’t have end2end encryption as default. Also you can’t create a secret group chat that you can start from your phone and continue from your Mac.
Myself I use TG extensively with friends, family, girlfriend and I think I've used secret chats once when the gf wanted to send a naughty photo.
It's not that I don't have anything to hide, it's just I choose what to say according to the environment and I feel the features of telegram far outweigh the con of not having e2e at all times.