Yep.  Whether we consider it a good expense or a boondoggle, fact is we've sunk $billions into building those tracks so one way or the other we're stuck with them.  They'll get used, if not much in the near term they surely will in the long term as metro Denver gets more and more dense.  None of the tracks are going to get ripped out now that they're in place and that money is sunk cost.

Short of a plague or something, human population will just keep soaring.  And it seems like half of them want to relocate to Colorado.