Although the article does not add anything new, I do have to agree that the way Telegram is positioning itself is rather frustrating: they are really pushing the "secure" nature of the service and try their best to make it seem even _more_ secure than WhatsApp or Signal (eg. speculating other encryption standards are US-funded and therefor not trustworthy), while it is clear that they have made some design decisions that make it less secure. And that's fine!
The user experience is great, and I like the service in general. The fact that it's not tied to an advertising company that is profiling users and making money of it is of course the biggest plus, but please stop with the whole "totally secure" BS. It's confusing and is probably even hurting their image: I have had to explain multiple times to friends and family I finally moved off of WhatsApp that we did not do it for the security, but rather to be free of being mined for personal data... Same thing goes for these non-tech 'news' sources that make a big deal out of it as well, while it's totally obvious if you investigate a bit more.
(Apologies for the rant, I guess had to get this off my chest.)