GPL: fear is the key
The third revision of the General Public Licence has been out for just short of three weeks but plenty of people are already questioning why take-up has been so slow.
This, after less than three weeks.
After the initial question about take-up (in various forums) the talk then tends towards a standard argument - take-up is slow because the licence will hurt developers_and_business.
I've even seen a few "surveys" - you know the kind which the author refers to as "a quick survey." It reminds me of a man I worked with in the Middle East; whenever he wanted to bolster his reports with a bit of vox pop, he would resort to citing a "quick survey among taxi-drivers in ....."
Of course, he was always the person who had done the survey though he never mentioned it.
There's one thing driving this kind of talk.