ITX cases are inherently a challenge. Not only from a PC building perspective, where their intricate internal layouts make them incredibly frustrating yet satisfying to work with, but also from a manufacturing standpoint. You have to finely balance so many variables when designing a solid ITX offering. Build quality, hardware compatibility, style, features, and ease-of-use all play a major part in that process. But the big one is overall footprint; that is what makes or breaks a great ITX case.
For many in the SFF (small form factor) enthusiast space, the majority of modern ITX cases just aren't small enough. Most are big, bulky juggernauts that fall more on the side of a being Micro-ATX setup, or some weird Frankenstein mid-tower, complete with dual rad support and GPU space larger than most keyboards.
