Joyent's tech is very good, don't me wrong, but I think this is a bit harsh.
- lx-branded zones and window's new layer are both doing system call translation---you're post doesn't contradict this but doesn't make it clear either.
- At some point lx-branded zones where equally untested.
- "Desktop class" is misleading because NT was designed for servers. Now yes Windows as a whole is hamstrung by a business model putting desktops and backwards-comparability first, but by definition the Linux layer can ignore a lot of Win32 precedent.
- Yes Illumos is Unix and NT isn't, but the difficulty in translating linux systems calls lies not with the ones backing posix-interfaces, but the Linux-specific ones. (Joyent devs can give you some great horror stories here.) It may be a bit harder with NT but it was hard already.
