I'm particularly impressed with XBSX2 and PCSX2, I have an OG PS2 (fat one) but I seldomly use it because when you plug it into a big screen TV the graphics are all out of whack because it was designed with older "fat" TV's in mind. The emulators though allow you to upscale graphics which makes them so much more playable on a large screen TV. Granted there are bugs and various issues you have to get over and setting up the entire system can be a little challenging and time consuming but it's hard to complain.
And overall I think the Series S is one of the best bangs for your buck in the game console space, at $299, it's much cheaper than even the PS5 digital edition that comes in at $450. Though I bought mine back during the "PS5 Crunch" where the only PS5's you could find online were all resellers that marked them up 1.5-2X the original price, so $299 versus $600-700 was a great deal.