IMO it really depends on how, where and what country you started off in the industry.
I've trained audio engineers and found PPMs take a bit of getting used to, some folk get off to a bad start (read stuffing up a job) and never get to like them.
The primary problem with digital camera audio meters is, an audio recording engineer is not keeping watch on the meters all the time, so after the levels are set, they tend to be forgotten.
The ideal would be VU switchable to PPM with a good a set of in/out audio limiters.
Never gonna happen, even tho sound is 70% of what you see.