Perhaps my M was worn out, but it required so much force to press the keys that I got in the habit of pressing them hard, on any keyboard even w/o positive click.

I never had a problem with finding it ambiguous whether a key actually got pressed before using the M, except on ultra cheapo keyboards made in the early 90s.

Before I used the M I'd type with soft, smooth motions. Typing on a well designed computer keyboard bears no resemblance to pounding on an old fashioned mechanical typewriter, which is (I believe) what the M was trying to mimic.