Fear Uncertainty and Doubt
Winer is FUD'ing Mac OS X. Amusingly, he's porting his software to it anyway. (And I'm glad he is!)
Perhaps Dave hasn't heard the fragile base class problem and what happens when you base an entire OS on C++. If you haven't either, here's the rub -- every time a new version of BeOS comes out, all the apps have to be recompiled and reinstalled to work on the new version, because BeOS's frameworks (the base classes) keep changing.
NeXTStep was ready for end users in the early 90s, Be wasn't ready until last year when BeOS 5 Professional came out. Oh, and no FBC problem.
But then again, it's so much easier for some people to spread bullshit, pretending like they know what they're talking about.
In case you're wondering what makes me qualified to rebut, I've purchased (with my own money, not any employer's money), installed and used OpenStep 4.1 for Intel, BeOS 3.0, 3.1, 4.0, 4.5 and 5.0 (Personal and Professional) for Intel, Mac OS X Server 1.0, Mac OS X DP3, DP4, and the Public Beta. I've also developed software on OpenStep/OSX. I tried to develop software on BeOS but the tools sucked (the Kits are pretty cool though) too bad to make it enjoyable.