Sure.
To get out of a building, you need at least one stairway, certainly. Historically, lower-rise buildings tend to have only a single stairway. The most lower-rise would be a single-family house, and there's only a single stairway. As the building gets taller, naturally, the egress requirements get more intense. Since you're farther from the ground, it's harder to rescue people, and this happens all over the world.
However, in the United States and particularly in Canada, the requirements get very tight very low to the ground. In Canada, it is effectively impossible to build an apartment building with multiple storeys with only a single stair. This sounds like a minor issue, but for a small urban site, it can be quite an imposition. I don't have data from Canada, but in the United States—prices are probably pretty similar—a four-storey stairway costs about a little over $200,000, depending on the market. I would assume it's a similar price in Canada. For a larger building, for a building on a former industrial site, maybe a commercial site where you have dozens of units on the floor, this is not a very high cost. However, I know that cities across Canada are encouraging and allowing multi-family buildings on what were formerly single-family lots, and on a small lot for example, it can be quite an imposition and quite a high cost.
There are all sorts of ways—