This. Telegram got a lot of things right. They have clients that work well on all platforms. Features like the Bot API and Channels have a lot of potential. However, their home-grown crypto and dismissal of feedback from the crypto community makes it hard for me to recommend it to anyone.
So far Telegram has done everything right. They have awesome native apps on all the platforms, no stupid web-wrappers that are slow and buggy. I haven't had a single bug, it's always been extremely fast and reliable. This is what makes a truly great user experience.
it would be great if open source solutions like Telegram, Signal and Matrix (and others) would all interoperate. I work on Matrix (https://matrix,.org) but I don't really care which client you want to use - as long as we can still talk to each other!
I recommend it just because it has questionable crypto, to feed at least some data into Russia and not only to USA. Just to not have only one unchallenged world surveillance power.
