A few reasons, including ease of maintaining package repos with pacman, rolling-release nature, easy networking tools, and more. I will also concede a bit of personal preference :) But like that post said, there isn't much of a reason in my mind to consider the specifics of individual distros, as arkOS is very "bare bones" and should require ideally no command line use in the first place. I haven't had any difficulty in getting Arch/ALARM to play nice with other architectures in the past but if you have specific experiences I'd love to hear about them. Thank you!