I would play so much stardew valley on that thing. I'll have to keep an eye out for a second hand one. 850$ is a lot. Especially since I'd have to wipe ShitstainOS™ off it to install something usable like steam os or Arch.
GPD has been in the handheld PC game for quite some time. But, unlike Valve who can sell their deck with little revenue thanks to their storefront, they actually need to make a profit on the individual units.