Look at Mac OS. That's what happens when freedoms don't have to be honoured. Corporations have spent a lot of effort trying to work around the GPL, whether it was via network services or something else.
If everyone had gone down the BSD route we would have been there, just a lot quicker. This is why I would never licence any of my work as anything other than GPL or AGPL (dual so that people can pay to avoid GPL, but they still contribute financially).
This is all a team effort to make the world a better place and BSD is too idealistic.
