Re: "Which is where MS should have stopped."
I'm pretty sure Win2k has support for SMP... Boards from both AMD, and Intel from back in the day, when counting the "Cores" was as simple as counting the number of Sockets that Board had.
Yeah Ok this was probably more of a stacked racked config, then say something sitting inside a 200x's Mac Pro. with more thorughly modern Xenons then the Pentium II/III era Xenons from back then.
SSDs? What would that have to do with the OS? Or am I just being a silly goose for asuming that being SATA... Your SSD should have to adhear to LOL the ATA / IDE Spec? Which is as old as DOS!
USB 3.0 / 4 /4 2x2 etc... Yeah ok that could be an yitch... Asuming you wern't able to write the low lever kernel Divers for that. 10+Gib.... LOL remind us how long 1Gig Ethernet has been around again. By my count at least as long as Win2k. And, how widely do you think 1Gig Ethernet has been adopted within that time? Well AVM (Fritzbox), a huge player for Modem / Router / Wifi Boxen, only just got 'round to adding GigE to the line, about what Five Years ago. So forgive me if I refuse to hold my breath for a solid 10GE anytime within the hours of whatever remains before this even bcomes a thing, outside of the Enterprise market. /Clarkson rant
RAM (Or a lack thereof), probably would also need to be adressed in the modern age.
But, these are NOT the things in which the Op had in his mind surly when he wrote, what he did. And, for what its worth. Win2k was the best OS they ever came out with. Windows VII could be the second. I'm gonna dismiss XP as being little more than Win2k with DirectX (Whatever version it got up to at that point... Google it yourselves!), and a lick of stylish Blue Paint to soothe the inmates in then asylum.