My understanding was that some people in the community believed that GPLv3 was better, and one of Linus's criticisms was that it was essentially impossible to s

My understanding was that some people in the community believed that GPLv3 was better, and one of Linus's criticisms was that it was essentially impossible to switch even if it were better. I also believe Linus was opposed to the switch, which would make it unlikely anyway, but even if he had approved, I still think it would be practically impossible.