TLDR: It’s compatible with other copy-left licenses like GPLv3. However, it’s available in multiple languages, which technically makes it more applicable.
I started using it for my own project. If you want a practical example: https://github.com/TimoKats/emmer
With licenses, I don’t think the goal is to create one universal standard. More options is typically better.
It is not. It makes evaluation more complicated, as well as sharing code among projects.