> the speed and ease with which I can find what I want (as a potential customer) using that top navigation menu is superior to anything I've seen done so far.

The web catches up to the past again. :-) Despite all the modern attempts at simplified "delightful" interfaces, a well-structured menu bar is hard to beat.

Pet peeve of mine: Huge headers on webpages that is sticky for no reason (looking at you, ACM Digital Library)