Yeah, Metro Detroit taxpayers need to spend megabillions for a commuter train to Metro Airport because it will make Detroit a huge convention city, never mind that such a train wouldn't go downtown, and the biggest convention cities on earth are Orlando and Vegas, cities with awful transit.
Couldn't we just have hourly shuttles to the airport for the duration of a convention? Non stop transportation for conventioneers to leave the city, and not deal with the denizens proper?