So if you need faster graphics you can buy a PCIe adapter, an expensive separate GPU that will end up costing more than the Mini PC itself, and a dock for that GPU to sit in. I don't doubt this is an option, but this voids the only thing I'm talking about, and that's value. I am curious, though: what is the max PCIe bandwidth you can reap from such a setup with the RP5?
If the goal is a cabinet the Mini PC isn't a viable option since it isn't designed for that. Anyone doing that can ignore what I've said. Or at least it isn't without somehow improvising construction so that the mini PC sits inside the cabinet. Perhaps that would be a worthwhile pursuit for DIYers since they seem to be into improvisations that extract more value from hardware by applying ingenuity to a problem.
I just asked a simple question about Batocera.