Or, more like Makefiles, and an enormous amount of cache for the runtime and build system, but this cache never really gets invalidated. Basically it's like us

Or, more like Makefiles, and an enormous amount of cache for the runtime and build system, but this cache never really gets invalidated. Basically it's like using a "buggy filesystem" (like ext2) that only shows the first ~16000 files in a directory. So having too much junk can hide stuff, having too little of it can uncover files that evolution carefully hid, and so on.