In my opinion GitHub is seriously good software, but it is awkward when FOSS software is developed on it instead of on Codeberg, Gitea or another FOSS platform.
Discord is actually a security risk, it walls information off the outside world (compared to a forum or IRC server) and incredibly difficult to find information in even when you're in the server (as opposed to documentation or a forum)
Matrix has 2/3 of these issues, so it being FOSS aside I very much would hate it when development discussion and software documentation is done through Matrix, as well.
How so?