It can and has worked in the past, but only over water. Ground effect planes over land have the problem that land isn't really flat, and ground effect doesn't b

It can and has worked in the past, but only over water. Ground effect planes over land have the problem that land isn't really flat, and ground effect doesn't buffer as well as you might imagine. Even small mounds of dirt can cause an extremely uncomfortable ride. You can think of it like riding in a massive monster truck, but without shock absorbers. You're basically guaranteed to get sick.