Terrific job by Rene Ritchie. Lots to absorb here, definitely worth the read.

Don’t miss the big chart that lays out the major features of every version of OS X since the very first release, code-named Cheetah.

I remember working at Metrowerks back then, on a Cheetah beta, trying to wrap my head around the huge leap from Mac OS to this jarring, new-fangled OS Steve Jobs seemed intent on forcing down our throats. A sea-change. But ultimately, far superior in every way. Smart guy.