You received an answer, and you're asking the question for the second time? It's stability. That's it.
Try running something Arch based for a significant amount of time, and then make up your opinion. Running an OS for a short time is not enough to judge its stability.
I used to use Antergos (Arch based, uses Arch repositories) and my system broke every 3 months. Eventually I got fed up with reinstalling my system each time and switched to Solus.
Running a system for a week or a month is not enough to judge its stability.