This specific problem can be solved by rotating motherboard 90 degrees (there are a few Silverstone cases that are laid out like this, they also tend to have excellent air cooling performance).
Yeah, I've had a Silverstone Raven for 10+ years, so I'm not sure why those types of cases haven't become the standard. They have their flaws, like it being awkward to route your cables into the top area, and needing good airspace underneath the case. But it's balanced out by being able to easily plug stuff into the top when you don't care about pretty cable routing, a focus on powerful, adjustable airflow, and less need for space on the sides. I'm guessing vertical space is the main problem for people.
