For content sites, it's probably fine. But for more functional sites, a lot of hamburger usage seems to be simply avoiding having to put some energy into your a

For content sites, it's probably fine. But for more functional sites, a lot of hamburger usage seems to be simply avoiding having to put some energy into your app's design. Most of the apple apps put the buttons at the bottom and include a "more" if necessary. My sense is the hamburger became more prevalent when it was used by default in Bootstrap, et al.