Those who kinda like downsizing, but don't want to be limited to ITX and SFF parts
Heres Raijintek Thetis [0]. Takes full size ATX motherboards, GPUs, CPU coolers and power supplies. Dimensions 210×360×366 mm (27.7L), smaller than most mATX cases and rivaling some ITX.
I keep looking at it, trying to find an excuse to build a new system, but waiting for next gen Ryzen.
[0] https://www.raijintek.com/en/products_detail.php?ProductID=5...