OP has no idea what is possible in CI when you integrate intelligence about your compiler/linker into the build executor and run it massively parallel. CI isn’t

OP has no idea what is possible in CI when you integrate intelligence about your compiler/linker into the build executor and run it massively parallel. CI isn’t going anywhere bc parallel cloud execution will always build faster than your laptop. Less time wasted and less heat on your lap. BigCos are already doing this (some for over ten years) and running laps around garden variety CI. They are investing more in CI today than ever because the assumptions the OP made are incorrect.