And what's the commonality between all these OS's? They are primarily used in servers, where 64 bit computing makes a bigger difference. Aside from Linux which has a small desktop following and a smattering of BSD (on which MAC OS X is based), none of these OS's really serve the desktop. In that regard, it looks as though Apple is ahead and not behind. Until 64-bit desktop software arrives (or is deemed necessary), you're unlikely to see much progression. I doubt that Apple sees the immediate need to make Panter fully 64-bit when there are so few 64-bit applications thus far. Seeing as Apple is routinely releasing a major version of OS X roughlly every year, I'll be surprised if Panther's successor isn't "more" 64-bit, when some time will have passed and there will be more to talk about.
