On the OSR2 vs Win2K issue, here is my take:
When you make an OS, there are always trade-offs, and so you have to decide who your target market is, and design the OS with that target in mind. The NT kernel is designed with the corporate market in mind, and hence it emphasizes stability and security. It does so at the cost of raw speed, and multimedia compatability. Moreover, it hogs massive amounts of ram just to stay afloat. It also is less compatable with games than the Win9x kernel. Thus, if you are a corporate customer who is concerned primarily with stability and security, and nor concerned about dedicating a sizeable chunk of your ram simply to keep the OS afloat, and you do not require the widest possible gaming compatability, then the NT kernel is your best OS.
However, if you are a gamer, you will find that the 9x kernel is a better OS, for all the reasons mentioned above: wider game compatability, less resources hogged by the OS (which is especially important for gamers, since games themselves often require massive amounts of ram for optimal performance), and, if you run without the bloated IE shell, you will experience greater performance overall, since less system resources are being sapped by the shell.
As a gamer, I am not interested in having USB devices, since USB saps off cpu cycles by its very nature.
The truth is, DOS is a better gaming OS that Windows, but the reason that DOS is not the best OS for a gamer is the fact that the latest games do not run in DOS, therefore the DOS Gamer will find that he does not have a wide variety of games to run. Therefore, all things considered, OSR2 is the best gaming OS: high performance, plus widest game availability.
btw, I find OSR2 to be very stable, even on my overclocked Thunderbird 800@856. The only time I can guarantee a crash is if I over-multi-task the IDE channels, by, say, downloading 10 mp3's simultaneously while playing another mp3 at 256bit quality: the multiple writes and intensive reads over-tax the ide channel.
People are finally begining to realize (especially with WinME) that the "latest" product from MS is not necessarily the best (Media Player 7 anyone?). The 9x kernel hit its peak with OSR2. As for NT/2K, it is targetted for a different market segment, and is not the optimal gaming OS, nor was it ever intended to be.