"If “AI-rewriting” is accepted as a valid way to change licenses, it represents the end of Copyleft. "

Software in the AI era is not that important.

Copyleft has already won, you can have new code in 40 seconds for $0.70 worth of tokens.

Just take the code and let it AI rewrite. But... AI was taught on all the OpenSource Code available. Lot of them were GPL I think... So...

Let’s then abolish all copyright on all software, what ever could go wrong?

It doesn't matter any more! Software is a (very cheap) commodity now.