In this article you say "...There are, however, plenty of articles on how it's not secure, from respected sources that provide substantial evidence for their claims. And there are now at least two papers formally presenting actual attacks on Telegram's protocol: 1, 2 (I have not reviewed these papers in detail; I see no reason to spend the time on it)..."
I remember in your first version you provided links to 1 and 2. I followed those links to find interesting debates from a few years ago. Why did you edit and remove the links?