You are right that he can't unilaterally relicense the kernel and that it will likely never happen, but Linus is in fact against the GPLv3, see debconf 14 Q&A:

You are right that he can't unilaterally relicense the kernel and that it will likely never happen, but Linus is in fact against the GPLv3, see debconf 14 Q&A: https://youtu.be/5PmHRSeA2c8?t=2840 https://youtu.be/5PmHRSeA2c8?t=2840