I would assume that the bad quality of Catalina and iOS 13 when they were released had to do with the restructuring of the development teams and the general cod

I would assume that the bad quality of Catalina and iOS 13 when they were released had to do with the restructuring of the development teams and the general code changes in preparation of the move to Apple Silicon. While iOS was based on a fork of macOS, those code bases had drifted apart for a while. It seems that Apple remerged the common parts for Big Sur. There is hope, that Big Sur doesn't start as bad as Catalina. So I wouldn't see why the MacBook wouldn't fufil the needs of a customer or developer.