@dos @dpk well the joke is that it's as permissive/lax of a license as the most permissive/lax license in effect, but most lax licenses aren't lax because they can be relicensed, they still ordinarily operate under the terms of the original license, unless there's a specific clause for relicensing
But GPLv3 "or later" has the challenge where you have to trust the FSF, and that does have that challenge (and is meant to evoke thoughts about that)
License upgrade stewardship is a tough problem.