I can get there pretty easily if I forgo Windows Steam games. BigBox is by far the best front end for retro stuff. But this NUC has enough horsepower to play some decent Windows games after upping the RAM, replacing the system drive and attaching an eGPU. The tradeoff seems to be accepting some jankiness when switching between retro (BB) and Windows games. It's easy to feature only one vs the other, but to have both seamlessly swap between each other with no mouse or keyboard reaching seems like a lofty goal that is, mostly, unattainable.
I can do it easily with my Shield 2019 Pro, but then Windows games become dependent upon Sunshine/Moonlight. Doable, but native is better. And BB for Android is great, but the Windows version is far superior and I can build it out such better hardware.