[rlanday]

I think a big part of the reason is that they don’t want random people posting on the internet about all the bugs they encountered with prerelease software and how much it sucks, because it can taint people’s opinions of the final product.

[rogerchucker]

I kinda figured that part but to me that's a very very archaic way of thinking given that a significant number of people will eventually break the NDA and hint about bugs.