From the Q&A
I have a hard time believing that, especially given the OL capacity constraints
I'd also mention that it's notable that no modelling has been provided whatsoever for long term crowding relief on Line 1 north of Eglinton. Likely because doing so would reveal that the Ontario Line is completely ineffective at relieving Yonge Line capacity constraints north of Eglinton in the long term.
Everyone should be reminded of this map, showing that in just 10 years (same time as the OL opening), Line 1 will be operating between 75 and 100% of capacity as far north as Sheppard. When the OL is 10 years old, in 2040, this entire segment will likely be at 100% capacity. OL does nothing to address this, and will not be able to address this in the future. I anticipate that more up-to-date modelling would show even more crowding, due to Toronto's increasing population growth rate. The inability of the Ontario Line to achieve its primary goal of providing long term Yonge Line crowding relief is a fairly critical flaw in the proposal.