Actually, a lot don't. I mean, like, at least fifty percent. You would be surprised. I don't think it's schools being conservative so much as it didn't occur to teachers and staff that analogue clocks are frankly obsolete (I still like them). I didn't read this article, but it sounds like that's being corrected.

Anyways, I really respect your attitude that it's not worth getting bent out of shape or spending a lot of time on, I think you're right. A lot of people get precious about it or, worse, make fun of kids like they're stupid because they haven't wasted their time learning to read, essentially, a sundial.