Comment by strogonoff

The idea of local maximum means to get from one local peak to another, even if it is a higher one, you need to first go through a valley.

Somebody comes up with an acceptable solution to a design problem, people get used to it, then when somebody comes up with an otherwise theoretically better solution it is in practical terms worse at first because the user has an intuition for another one already. Having to relearn is worse than if there was no preexisting intuition yet.

This is why it is possible to say it is both not very intuitive but good.