1·2 years ago- Stability (yes, Arch is more stable than Ubuntu, at least in my anecdotal experience)
- The most recent package versions (no more running ancient stuff with the only way of upgrading is compiling from source, which then may break something your distro relies on)
- AUR (also know as “anything you ever need installable in a quick and easy way”)
- Learning experience (you learn new things faster if you’re an intermediate Linux enthusiast)