Playing one DOS game. Not supporting a whole platform and the software developed for it with a multitude of stakeholders (consumers, game developers, game publishers), lots of contracts and responsibilities to be held against those contracts. Verifying if each game runs properly on the emulation layer or if there will be unforeseen bugs later in the game progression due to some weird combination of programming voodoo and the system.

I don't mean to say that given Microsoft's development power it's a massive achievement but it's an achievement and should be assessed objectively, not with snarky comments.

>Playing one DOS game.

?? No with dos-box you can nearly play all of them. It's just one emulator but then you have also NES SNES GB SGB Saturn Wii PS1/2/3 PSP Wine Atari Commodore etc...

Dolphin emulator is the 8th wonder of the world

Absolutely!!!! What a great piece of software.