Hey
@jcvikl,
As much as I agree, problem is, developing something takes time, research, trials, and even money. Even in an open source community there's people that would work on something but if they're not getting paid for it and get crapped on would drop the project completely. Since Plesk itself is not open source they have developers on payroll so they can develop it, which takes time and research and testing.
Also, let's be honest here, nothing is 100% open source anymore. You have a lot of distros that mostly open source but there's a lot of proprietary software out there as well. Hell, even most distros that's freely available are also playing those "corporate games" that you've referred to, it's just how the world turns. Plus if you look at the market share for Linux distros used for websites, you would see that the major players are actually Ubuntu (32.1%), Debian (16.8%), and CentOS (8.6%), Rocky isn't even listed (AlmaLinux is there in the top 10) (
Usage Statistics and Market Share of Linux for Websites, January 2023).
In terms of LiteSpeed, they don't seem to be all that aggressive considering their current market share of servers using it is currently 11.6% compared to 34% for Nginx and 33.2% for Apache (
Nginx vs. Apache vs. LiteSpeed usage statistics, January 2023), which is saying something considering LiteSpeed came out in 2003, a year before Nginx.
Basically if there's no interest and people actually voting for items (as linked by maartenv above), it basically gets put on the back burner for testing and providing official support. Nothing's something you from trying to actually install Plesk and test it out, it just won't be officially supported since it hasn't been fully tested and work out whatever quirks that distro might have for it to just work.