At risk of self promotion, I think more people should adopt something like the Ship of Theseus license (https://github.com/tilework-tech/nori-skillsets/pull/465/cha...). It's not obvious if this will patch the clean room hole in licensing, but I'd rather see it play out in court than assume opensource is just fully dead
I cannot imagine that license addendum is legally enforceable (let alone provable) in most jurisdictions on earth but it is interesting.