I understand it's not going to happen - I linked one such conversation in my first comment. I think the reasoning is silly (His definitions might be "right", but he's the only one using those definitions), but I'm not arguing with them about it.

And I agree that `make clean` isn't perfect, I think that is what makes the fact that `tup clean` doesn't exist even more annoying. A lot of people recommend including an auxiliary Makefile or script to do the cleaning, but it can never be as good as if `tup` just did it itself since it is aware of exactly what files it as created during the build process.