No, licenses are not standards that require code changes to be adopted. The OSS community has a long history of moving off old licenses to new versions and the

No, licenses are not standards that require code changes to be adopted. The OSS community has a long history of moving off old licenses to new versions and the OSI lists many retired licenses due to this. (When Apache replaced their 1.1 license with the current 2.0 license, there was no complaint about proliferation. Rather, the community adopted the new license and today 1.1 is entirely dead.)