Large floor plates make it difficult to fit in smaller, affordable apartments with their own windows and full utilization of the interior. The rich already have their dedicated aeries so they don't need to live in a conversion to find large spaces.

Here's a quick one https://www.wsj.com/video/series/wsj-explains/what-it-takes-...

Short version:

Commercial buildings are too deep and so you have to do fancy things to give internal apartments natural light and meet building regulations for windows.

I don't think the points made in that video will survive long-term. Zoning laws will be forced to change, i.e. minimum parking laws, single zone areas, expensive high-end designs, high-pressure plumbing per residence, lack of use of fiberoptics for sunlight lamps etc. Ideal designs will need to change to accommodate all the empty space that will slowly fall apart without use. I would hate to see all these huge buildings demolished on a shortened lifecycle.