> Telegram, on the other hand, has been absolutely reliable, both in regular and secure chats. Never a lost message, never a delayed message.

> Same for Whatsapp.

what's disturbing to me (from a relatively naive perspective -- I'm familiar with terms like PSTN and MVNO and the general system, but I havn't worked in telecom): you've described what would be exactly how a nation state would kill a superior and more secure messaging app. Compel telcos to drop/delay GCM of websocket/GCM push notifications for a small minority of device IDs, so that the userbase rotted away...