What I read between the lines: “I have such a fragile ego that I feel offended when a tool points out a mistake I made. I feel intellectually rewarded by doing the same busywork over and over again. I don’t want to change the way I do my work at all. I feel left behind when people other than me have great ideas about language design.”
“The dog/child/vacuum cleaner ate my instruction manual” is probably a common support request at Lego, so there is no point in making the digital manuals difficult to access.
Begin by throwing the language away. Provide a tool that converts existing CMake scripts to the new, sane language. Use an established programming language for the new language.
Apparently not. It is crazy that they delete a random line of code and don't update or add a single test at the same time. Absolute madness. I wonder what they are doing instead that ensures the Kernel mostly works.
Yes, and that's what automated tests are for. They "replicate" specific conditions and make it possible to cover everything. That's what unit tests are. This has nothing to do with the physical world.