Hey now, even Stockholm has 200 km of
commuter rail track to supplement its metro system.
Don't get testy everyone! Commuter rail communities have incentive to build as dense and big as possible around stations in TOD, as it generates the most tax revenue for the least amount of infrastructure spending. With prods from the provincial land use formula, and sprawl limited by water liscenses I think there wouldn't be a problem.
Politically, this government is already the most protransit and pro city in provincial history, some times they have to throw a bone at the bed rock of support. I would much rather have that bone be commuter rail rather than the alternative of new freeways radiating from the ring road.