Ubuntu was a fantastic distribution to start early on. Especially in the pre-10.x days there weren’t many beginner friendly ones. Your alternatives were Debian with very outdated software, SuSE which was kind of OK, Fedora which was also quite unstable and lacking packages (remember hunting RPMs on the old RPMfusion?) or Ubuntu. At some point I’d outgrown Ubuntu and moved on to greener pastures. Nowadays I’m not sure I’d be recommending Ubuntu to new users, Fedora is quite good and without all the snap store shenanigans. Even Debian installation experience is not too bad and it’s not lacking too much in software.

Yes Conversations is still a paid app on Play Store. The F-Droid version also doesn’t support Google cloud notifications so some message notifications will go missing occasionally. For Android there’s also Quickly which is a Conversations fork and aTalk which works OK but reminds me of 90s Windows software. It’s still quite usable though. Honestly Conversations is totally worth the money if only for the amount of effort gone into modernising the platform which also a testament to its extensibility.

It’s trivial to self host. I’m running a server on a small VPS for the family. Best part is they don’t even know they are running XMPP, just installed Conversations and that was it.

I doubt it was accidental, that’s standard tech corp playbook. Build on established technology or open standard, then shut the gates when critical mass has been achieved.