I would love if Telegram would also be a Matrix client. Matrix is like email but for chats. Its decentralized. So everyone can choose a server or run their own. Everyone can then write to people on every other server like known from emails. My suggestion is that Telegram operates its own Matrix server. Users can choose a Matrix name and can write and receive messages over the Matrix network as well via Telegram. These chats would not support all Telegram features since the Matrix protocol does not have all the features that Telegram has. But it would drive messaging to a bit more decentralization and openness which is definitely good for freedom. Also the Matrix protocol is completely open and since the development process of the protocol is open too the Telegram team could probably add needed features to it.