Yes, I remember using zsh and in my experience this was barely
useful since most Makefiles are auto-generated with hundreds or
thousands of targets.
> one could always have a 'help' target that prints a short documentation
Sure, that's fine. But the point is that if you have an unknown Makefile
you can't (or shouldn't) just execute it without knowing what it will
do. Makefiles should be treated as individual programs just like any
other executable and there's no guaranteed standard way to get help
from it.
