Heat is not a deal breaker,as an AB amp. I would guess the source of heat to be the 2 toroidal transformers to power the unit. The issue is USB implementation on x26 which has ZERO support(no driver update on native DSD support) and delivers sub-optimal Sound Quality compared to Coax and optical.

Mine runs hot too, it can slowly cook an egg.. Running Roon on linux, there is No Linux Drivers available for it to play anything above 192Khz.