Any hidden disadvantage to lever-type door latches?
It‘s interesting how these things differ among cultures!

In Europe (Germany for sure, but I never observed a difference in other European countries) basically all doors have levers. Here you install a knob only when you need the feature that it becomes more difficult open a door for pets and toddlers.

However, in most of these cases you can already get away with putting the handle upright, so knobs are really rare.