This is an interesting requirement and makes me wonder if some of the need for two staircases comes from the proximity - or lack thereof - to fire services. I'd be sitting in a burning home for a long time if I had to wait for a fire ladder.
The American city topology is basically office towers surrounded by single family homes; in the midcentury we demolished a lot of the in-between building stock, which is now referred to by urbanists as the "missing middle". Compare this to Europe or Japan which is largely buildings in between those sizes.
My current tower rig is 85’, our next will be 105.
Consider that is ladder length and the “true” height is really a hypotenuse on a right triangle with one side the building.
We can generally reach most of our properties just fine, as our tallest is about 5 stories. However there are some across a river with access harder in front, and a ladder across the river is the way to go.