Repacking6528 the problem with Telegram is that it's not really an open platform, but rather a pretty shady company. And it's not really mainstream everywhere (for example, in Western Europe or the US). In my country, it's only popular among fringe groups of conspiracy theorists or right-wing activists. I know in other countries it's more popular or actually mainstream, but I believe it's not everywhere.
Of course, Matrix is not so popular (outside OSS and Privacy communities), but it's an open and privacy-respecting protocol and actually a pretty good alternative to Discord (with the possibility to have interoperability). And also, it is in line with using Discourse as forum software, as Kagi already does.
