The GPL is avoided by many (as in companies/corporations) because they don't want to risk it just in case. And then for those who do use it in derivatives, it becomes like a cancer, the eventual plan being it embraces, extends and extinguishes everything so that those who aim to avoid it may even one day be forced to use it, and therefore they become defeated and eliminated either way. :D

Or if you take a moral high ground like rms, the bsd is basically saying you can be naughty if you want. But the gpl says you can't be naughty, so therefore it's overall gooder, ∴ reason enough to use it. Although I agree this probably ain't practical but I guess the point is that you shouldn't nevertheless be specifically allowing everyone to be naughty if they want. And for organisations like fsf, I guess it isn't completely impractical since they have the sflc.