BSDs are nice, but I don't think they can be used reasonably well in a professional environment for example where you need to interact with multiple other projects.

Something Debian-based seem to have won this battle in the last decade or two. Ubuntu kinda solved this and created a massive community of experienced and inexperienced people sharing their knowledge and comments.

Maybe another distro is better for some reason, but there's basically no community for it compared to Ubuntu.

And then you have the Desktop environments as well... but that one has a clear winner, KDE of course.