Agreed here. It's tedious to change license later on. So that's why there's tools to push it along, it's not the first time [1]
As a stop gap - they can implement a contributor clause starting immediately. They can also say future commits post-[ref] are <this license> until the prior code is sunsetted.
Typically there is an uppercrust where a very high percentage of the contributions lay. I haven't looked at the code (played the game all the time back in HS) but I'd bet you 90% of the code contributions are with the top 5 committers.
As a stop gap - they can implement a contributor clause starting immediately. They can also say future commits post-[ref] are <this license> until the prior code is sunsetted.
Typically there is an uppercrust where a very high percentage of the contributions lay. I haven't looked at the code (played the game all the time back in HS) but I'd bet you 90% of the code contributions are with the top 5 committers.
[1] https://github.com/twbs/bootstrap/issues/2054