Who's left standing at the altar? Windows users, that's who. Windows has now become the only proprietary operating system without a free-software or open-source equivalent. Apple has Darwin. Solaris has Open Solaris. Unix has Linux and BSD. Even the extinct systems whose surviving fan base can count themselves in the triple-digits have a free alternative that they're working on. BeOS has Haiku, and Amiga has AROS. DOS has FreeDOS. CP/M has CP/M, after Lineo threw up its hands and released it. Ditto for Lucent and Plan Nine From Bell Labs. And Windows has... nothing!