In the article, the architect spoke about how the goal of single stair buildings is to kill that hallway - one stairwell with the doors to each apartment on the

In the article, the architect spoke about how the goal of single stair buildings is to kill that hallway - one stairwell with the doors to each apartment on the stair itself, then narrower lots; similar to how it’s done in Europe. He points out that the long corridor type of building you are describing is often caused by the need to make a Teo staircase build financially viable.