Or they could just get off at the station at the station at Kennedy and then take the bus the rest of the way. It would be silly to take the bus to McCowan and Sheppard, transfer onto the subway, take it one stop south to STC and then transfer to Line 4 to continue east, when instead you can just stay on the bus and take to straight to Line 4 at Kenndy and Sheppard. If Line 4 terminates at STC ridership patterns will adapt to this reality. Now I'll admit the EELRT in its current incarnation would throw a big wrench into this since transferring from the EELRT at Sheppard and than either taking the subway one stop south, or hopping on a bus for an addition 2km ride to the subway at Agincourt is just as bad, but if Line 4 terminates at STC than the onus will be on the City to adapt its EELRT plan around this somehow. At the same time when we were all fighting over the Line 2 extension, the linear transfer at Kennedy to Line 3 was often brought up, but I fail to see how creating a linear transfer along Sheppard between Line 4 and the EELRT is any better. Maybe you bridge this potential gap by extending the EELRT 2 or so extra kilometres to Agincourt and create a hub there between Line 4, the EELRT, and the GO Train, but that's just shifting the linear transfer down the road. It would also make no sense to route the EELRT down McCowan to STC since that would just duplicate the subway. Simply put transit expansion into Scarborough was always going to be a mess, the EELRT complicates matters, and not everyone will be happy with the outcome we get.