It's my understanding that a good portion of the cost for this bike infrastructure goes into the traffic light system/fixtures that have to be updated and integrated and so the more intersections with traffic lights a bike lane goes through adds to the cost.
Also multi use paths are some of the most costly type of infrastructure apparently. This type, at least, can be described as permanent. But for the separated bike lanes on streets type of infrastructure, it's also my understanding that none of it is going to be high quality permanent style barriers.
It's also my impression, and maybe not surprisingly and perhaps even understandable, that the city is nervous of the new infrastructure coming in 2025 and 2026 because there are going to be cases where some parking will be lost and/or a driving lane will be removed. You can tell that by where some of the routes will be and there's just no other way. And so that's when the public resistance is really going to start up again like it has regarding the early stage of planning on 76 Ave where a petition is going around to fight the loss of any parking or slowing down traffic. There's no resistance to the 2024 bike routes announced because it doesn't affect drivers in the least.
The city I guess is treading lightly for 2024. But as the active transportation system expands, which is essential, something will haVe to give in some areas such as parking (I hate how much space has to be dedicated to parking) and so that's when things will get noisy again.