if the RT had longer trains and was extended along Eglinton to meet up with a Don Mills rapid transit line going straight downtown, that would be lovely (would that be AreBe's RFT technology?), but the B/D extension is still the superior option. The ridership is there and everyone knows it. If the fare boundary at Steeles was removed somehow, Denison-area Markhamites would flood onto it in even greater numbers since it would allow you to travel from 14th to Yonge & Bloor in under an hour. Yes, the Stouffville line would get many to where they want to go quicker, but only with hundreds of millions of dollars in upgrades.