> Contacting all those contributors to get them to agree to a license change is a large undertaking.
With the right licensing language it doesn't need to be.
Authors must maintain contactability through emails listed in source / git commits, if authors fail to respond to pings about changes to licensing in a timely manner they forfeit their rights.
> Authors must maintain contactability through emails listed in source / git commits, if authors fail to respond to pings about changes to licensing in a timely manner they forfeit their rights.