Using those m.2 ssds via the Internal m.2 slots.
Yep, and it is. This is a multicade build with some Windows/Steam games, console emulators, classic mame, v pinball (fx3, etc), and sinden lightguns (whenever they arrive), and front ports for USB controllers. I can play Tekken 7 via Steam, the Killer Instinct steam version, etc all just fine thanks to the integrated Radeon RX Vega M GL GPU.