[Amadiro]

A isn't really very low-hanging though, rewriting the build-system for something as complex as the kernel would be quite the undertaking even just from a technical standpoint, let alone that you now have to change thousands of peoples workflow by having them install and use a new build-system (some of those people are probably dedicated to just maintaining the build-system too, so their job would radically change) as well as figure out a suitable build-system in the first place (which one would work well for the kernel? which one works on all the architectures people want to compile linux on? etc)

B from linus' perspective just means "wait a year for things to automatically get better (after throwing some money at it)" which seems like the low-effort solution.