In the AI age do such things matter? I am surprised they have not reimplemented at this point.

You mean doing an AI based "clean room" reimplenentation? IIRC the jury is still out on the validity of that technique (though I expect it will turn out that the practise is not actionable as other similar decisions have gone that way), but even if that is deemed perfectly legal and would get them out of the requirement for future releases, they should still release the code for the versions that are subject to the license.