It just makes no sense to keep cancelling because if they do it too much there will be too many seniors and juniors wanting to take the SAT that the schools won’t be able to meet health safety guidelines.
I doubt it is collegeboard or ACT that is driving these cancellations. They are risking their obsolescence with each one. If more and more state schools drop the requirement for this year, they may never reinstall it.
IMO, this is being driven by the local school boards who do not want the risk/liability of hosting the test at their schools.