I have been using Manjaro unstable branch since 2016 (I have survived 2 instances of forum gone haywire) and I haven’t experienced any downtime that I did not cause myself.
I have written a couple of mini guides
- [root tip] [How To] Avoid common pitfalls as developer
- [root tip] [How To] Update Manjaro the smart way
- [Need-To-Know] About Manjaro and AUR
That aside
- keep your system simple
- be picky about the filesystem you choose - stability over features (btrfs e.g. requires regular maintenance)
- be sure your custom theme
- if any - is maintained especially when using KDE and Gnome
My current workstation http://ix.io/4jFi