There's often a weird negotiation/ battle that goes on between developers and the city over what percent of units in a new building ate affordable vs market rate. It has nothing to do with them being small or Spartan or anything like that, and everything to do with income requirements and rent caps put on them
I actually studied housing issues in college because I was pursuing a BS with a concentration in housing as I wanted to be an urban planner. I am fully aware of the fact that the term is used that way in some situations and stated so in my comment. But, I write a fair amount about affordable housing and that isn't how I use it.
Good communication starts with context. This is the internet. It is not San Francisco.