Originally Posted by
mkjr
no sense in terms of cost or time? i'd say time. and if it's money, then it's disingenuous to suggest it is disingenuous...

Neither time nor money, but convenience. Even if the subway is running at the time I need to leave, Bay station has no elevator. I'd have to lug my 50lb suitcase and carry ons down a long flight of steps, then change at Yonge or St George to get to Union, then change again for the UPX.
Why would I subject myself to all that, when I can just get a limo from my apartment building to YYZ? The same applies to anyone with luggage to check, who does not live very close to an accessible subway station.