Reliability
Performance
Efficiency
Compatibility
Future proof
pacman/AUR
FOSS
Privacy
Speed
Support
Modularity
Unstable
Graphics
Sound
Screenshare
Arch can be used for productivity and school work. I use it as my daily driver operating system. I find the package manager superior to all other operating systems I've tried, and for me, it's an indispensable tool. Additionally, the modularity and control over the software on my machine is valuable to me and empowering from a privacy and efficiency standpoint.