For me, in part, it was when XP got to service pack 2.
For the rest of it, though, I'm still waiting, and I don't really believe it will ever happen. Amiga had something Windoze will never have - it gave priority to user input. Windows doesn't value user input highly, which is why, no matter how fast the hardware gets, it'll always seem slow ...
If I could actually get hardware that runs Amiga OS (at a price I could afford without mortgaging the house), I'd jump right back on it in a second.
