Entirely accidental. I'm not a developer and at most I had dabbled with a Linux in the past but nothing beyond a couple of VirtualBox VMs, I just didn't see or have a need for it.

Around late 2020 the note taking app Evernote changed a bunch of stuff. I had been using Evernote for years and suddenly they updated to a new feature-poor app and placed a bunch of restrictions on the free accounts. That prompted me to look at "free" (free as in money, not as in freedom) alternatives. I stumbled upon Joplin and really liked it. I noticed a few things I thought could be improved as well as a few bugs so I joined and started hanging around on the forums. At some point I realised I could probably fix one of these small issues myself (without any programming knowledge beyond some SQL) and, with some help and encouragement from some of the maintainers, was able to build the app from source, fix the issue and create a PR. I then got more involved with the community and started to improve the documentation.

That is when the open source bug bit me. I installed Linux as it just seemed (and was) easier than doing this kind of thing on Windows. I was invited to the Joplin team, got involved with Google Summer of Code as a mentor for Joplin and otherwise really got into it.

Then it all stepped up massively last year when GitHub announced they were killing off the Atom text editor. Whilst looking for alternatives I got involved with atom-community which then split off to create a fork of Atom, Pulsar which was a mad rush to get everything together. Not only save what we could of Atom (the package repository wasn't open source) but also to keep momentum going and make sure that those people using Atom still had somewhere to go and try to gather some sort of community whilst it was still somewhat relevant.

And yeah, otherwise now almost exclusively use open source stuff and try to get involved with the communities of other open source projects.