After seeing the success in New York I would love for something like that in Toronto’s downtown core; however serious and aggressive improvement of the TTC would be needed.
Right now a small power outage can cause massive delays. We need more lines, redundant systems, and a diversity of routes to let people redirect themselves when necessary.
In Canada it’s a politically successful strategy to agitate the suburbs. Even if implemented at the start of a liberal government, conservatives would be able to get rid of congestion fees in as little as 4 years.
Look at what Ontario is doing to the bike lanes in Toronto. It has been a struggle to get the bare minimum of biking infrastructure put in over the last 3 mayors of Toronto and the Provincial Conservatives have successfully campaigned suburbanites against the bikes lanes that are not even present in their own neighborhoods.