P2P chat is not something new and not something hard to do and based on old concepts of decentrialization it can be done with dispersed "central" servers. Telegram decided that they will route their traffic over central servers due to the potential profit of spying on their users. It is hard to imagine that FSB doesnt have a team of reverses that dissected Telegram protocol and found backdoors, which are cryptographical but usable by founder. Now they are paying for that. We need p2p chat/voice software, that cant be censored by design, but that invalidates an option to monetize it. But at the end, it is always the choice how cool the smileys look, isnt it?