I assure you a great many people take Linux seriously.

Do you remember any examples of things that made you turn away from those other distros?

Most big distros are old enough to drink though. Ubuntu is 20yo, Fedora 21yo, openSUSE 18yo, Arch 23yo, Gentoo 23yo. (I got curious and a bit carried away…)

But sure, Debian does have them beat by roughly 10 years (31yo).

My experience with Matrix is that the federation itself is a deal breaker. I have a pretty beefy server and good connection which was getting ddosed by running Matrix and timing out on so many requests for avatars/profiles etc. Maybe I did something wrong, but the whole experience rendered me quite skeptical to the viability of it as a federated chat.

That said I’ve had nothing but good experiences using it with big servers set up by pros.