That isn't a mini PC unfortunately like the NUCs, that a mini-tower. Also having official NUCs ensures there is good driver support via standardization.
It’s not a mini tower, here’s the case: https://www.inwin-style.com/en/gaming-chassis/Chopin
The case size is 9.6" x 3.3" x 8.6".
Modern NUCs are 8.7” x 1.5" x 5.5" but unlike that inwin they require external 19V 100W power adapter.
About driver support, based on my experience it’s the other way. Custom designed hardware decreases reliability. I have never encountered issues caused by driver support in the desktop PCs I’ve built from commodity components. But I remember issues caused by non-standard hardware design in e.g. sony vaio laptops.