I'll leave that to HTC's coding to decide
That's the problem, it's something that would take away from HTC's precious coading hours thus giving us less new toys to break. Also, not many people would be for it IMO and certain concessions must be made to make the people giving money happy (we used to also have night, but it was taken out due to it just annoying folks.)
P.S. This should go to the wishlist forum.