How public transit held up during Taylor Swift's Vancouver concerts

 https://dailyhive.com/vancouver/vancouver-event-traffic-congestion-public-transit

A small & narrow urban road system must be augmented by long rail rapid transit trains.

Thus, the SkyTrain should have been designed to eventually have longer stations, which could accomodate 8-10 car trains.

https://en.wikipedia.org/wiki/SkyTrain_(Vancouver)#Rolling_stock

https://en.wikipedia.org/wiki/Montreal_Metro#Current

https://en.wikipedia.org/wiki/MPM-10 

9 articulated cars per train

MPM-10_Azur

152.43 m (500 ft 1+1⁄8 in)

https://en.wikipedia.org/wiki/MPM-10#History

https://en.wikipedia.org/wiki/MR-73 

3 cars per trainset, operating as 6- or 9-car trains

https://en.wikipedia.org/wiki/MR-73#History

https://en.wikipedia.org/wiki/Toronto_subway#Rolling_stock

• 6-car set (Line 1)
• 4-car set (Line 4)

https://en.wikipedia.org/wiki/Toronto_Rocket

• 137.82 m (452 ft 2 in)^[2][3] (6-car set)
• 92.1 m (302 ft 2 in)^[3] (4-car set)

https://en.wikipedia.org/wiki/Toronto_Rocket#History