Tbh it kinda comes to the reason why there are some people still using Windows XP in 2023: they refuse to let go. If another operating system can give them the same experience as Windows 10 with the latest support for all applications, hopefully they'll take that as opposed to using an outdated version of Windows.
Source: my main gaming rig is switching to arch once windows 10 reaches eol
To be honest it is reliable on my system and the best thing is that I don't have to think about updates, out of date dependence, package versions or packages in general. Just paru package done. As long as you are fine with setting some stuff up manually Arch is pretty amazing.
I've used arch before because of it's philosophy of KISS. So far, no distro has been able to provide me with an experience as smooth as arch has. Plus I'm not just doing normie stuff I like to program sometimes.
TLDR: it's just what I'm comfortable using so idc if using another distro is easier for what I do.