I think that's a flawed analogy when applied to projects that will still take a long time even with the fast band-aid pull option. How long would it take to tear down the whole elevated portion and replace it with an at grade boulevard? 5-10 years? Imagine the chaos that would be caused without any access to both the Gardiner or Lakeshore during that period. At least when it's done in sections restricted access is limited to a much smaller area.
The construction timeline was 6 years for the "remove" option, with both the gardiner and lakeshore closed throughout. The hybrid option would keep lakeshore open most of the time, with construction lasting 1.5 years. Knowing delays/over-runs on these kinds of projects, I'd say we should assume they construction goes 30% longer than quoted.
I wish the debate hadn't centered around travel times - the larger issue at heart is, would a 8-10 lane at-grade expressway serving 120,000 cars/day, with no room for transit or bike lanes, create a nice neighbourhood?
Here's a section of the existing lakeshore boulevard which is 50m wide, the approximate width of the boulevard option. People have idyllic ideas of what a "boulevard" is, but few people have actually gone through the thought experiment of imagining what life on the street would be like.
I also wish the city was a bit more progressive and non-apologetic about experimenting. The best thing to do would be to just shut down the Gardiner East for two months and see how traffic responds... will it disappear like theories suggest? Will Richmond/Adelaide get gridlocked and thus gum up traffic on all of the downtown arterials? Will transit ridership increase? At the very least, it'd be an accurate picture of what would happen for the construction period of the boulevard option. And if traffic
does evaporate, you have a good case for softening/reducing the expressway/boulevard into something more like the 6-lane option of the Hybrid approach, which is much more humane at street level.