It'll benefit very few Torotonians. We've not had three separate ridership evaluations completed, and they've all shown incredibly minimal peak demand to/from the airport via Eglinton Line. I've yet to see a coherent case made for the extension to Pearson. Yes there are a lot of flights at Pearson, and yes there's a ton of people employed in the area, but it's yet to be shown in any study that it would translate to significant ridership originating at the airport. It feels like this airport extension is being pushed out of aspirational reasons ("it's the airport so obviously it needs rail rapid transit") than out of any genuine transportation demand. If GTAA wants to waste their money on this (and pay to operate it too), they're more than welcome, but the people of Toronto and Mississauga should not be stuck with the bill.