this idea has popped up from time to time over the years. always the same complaints, history, tradition, yadda yadda. thing is, they weren't running 300mph in the '50s! I know people are emotional over it, but it's just car racing. it's essentially an expensive hobby. even w/o drag racing (or any motorsports eventually I'm sure) life goes on, believe it or not.
all the historic records will still be there (they've all been broken anyway), so it'll just stand as a touchstone, that in 2009, the standard changed; there will be 'before' and 'after' ET's, that's all.