The big win that YaST brings is a common configuration and management interface across multiple UIs. Back when I used OpenSUSE, I had LXDE, KDE, and headless/CL

The big win that YaST brings is a common configuration and management interface across multiple UIs. Back when I used OpenSUSE, I had LXDE, KDE, and headless/CLI boxes which could all be administered using roughly the same interface. The big fail, though, is that most of the development effort goes into YaST, making it sort of awkward to script these things or change them manually using the CLI. It wasn't until switching to Arch Linux that I really felt like I understood how to configure my system without pointing and clicking.