Upgrading the Linux license to v3 would also require all copyright holders to agree, making it equally impossible to do in practice... in fact, probably more so

Upgrading the Linux license to v3 would also require all copyright holders to agree, making it equally impossible to do in practice... in fact, probably more so since most contributors would just blindly 'yea' vote on revoking the termination of an Android license for any specific vendor who came back into compliance whereas some of them are actively opposed to GPLv3 terms.