The issue is that, in typical Quebec (and Canadian) fashion, the entire thing has 0 vision or innovation to it. The shift to a more walkable city has been to imitate European cities as is, as if Montreal isn't different from say, Amsterdam or Copenhagen.

For most of the year, due to the cold and snow, the bike lanes are unused and are not convertible to anything else. Sure, some people still bike in the very cold months but that's an extreme minority that inherently includes mostly young, mostly fit cyclists. (Yes European cities also have winters, but they are usually way milder, even in northern cities like Stockholm)

Now, I'm still fully on board of having a walking/biking centric city when it makes sense, so convertible infrastructure would have been amazing. But instead we get half of the roads being unusable for anything during the colder months (look at St-Denis st. for example). Not even for bus transit. Which is to me ridiculous and is again, typical of Montreal's infrastructure projects.