^^definitely true, but irrelevant, at least to the purposes of this thread, as Stanford is sited in California, and the state has had a 21 year old limit for purchase AND consumption since 1933. Not likely to change any time soon, at least thru the Legislature.
OTOH, there is/was a State ballot prop collecting signatures to lower the age to 18. Financial impact if it passes: loss of $200 million in highway funds. But it did not qualify for the November ballot.
Regardless, while a state or two may go it alone (New Hampshire: Live Free or Die), national polls show 74% of folks against lowering the age of consumption.