Is it really progress that a diesel train in this modern era is used for a "new" line that prices out average commuters yet used public funds for construction?
I think questions about this service's viability are indeed valid. This isn't London. Heathrow Express is supported by plenty of business travelers who can claim the bill. Toronto does not have the same volume of business traffic that can sustain a frequent premium train service to the airport. Then you price out the families who can drive or take a taxi that costs less net. So who else do you have left? The yuppies who prefer to fly out of Billy Bishop, or the backpackers and commuters that can't afford it?
They should have included a commuter service so at least to do some public good but would take longer to get to the airport to justify the savings. They spent so much money on the infrastructure already - they should make the best use of it.