I am tempted to take the bait, and ask you what would be this massive backdoor, which nobody has time to discuss. If I am guessing right, you are still referring to "no default E2EE". In that regard, I would encourage you to consider that not everybody has the same security requirements, and many people are fine trusting Telegram and with the security it provides.
Personally, I cannot wait for Matrix to become more widely adopted, and to see the UI/UX of their clients to become remotely comparable with the one of Telegram.
Anyway, since it doesn't seem our discussion is going anywhere, maybe it's time to stop.
Thank you for the chat, I liked how we managed to stay polite even though we completely disagree :)
> Given that you wrote your article before Signal had even desktop clients, I don't think it's even remotely up to date to vouch for any kind of fruitful discussion
Yeah, I intentionally did not want to compare it to Signal (because the article was already too long that way).