actually it would make the super slim less viable.
The super slim came about because devs were trying to stretch FAR as vertical as possible to be able to charge a premium for views. So these super slims may forever be a relic of this era. (this is why they are passing it. to make it viable for devs to build vertical and create units for the non luxory market)
What it makes viable is a very tall thick tower. I mean a 2000 foot apartment tower would be possible. If the 1000 foot super slim 125 Greenwich can squeeze 364 apartments in there. I would think a bulky 2000 footer could easily get 2200. Lets say it cost 3 billion to develop. The break even point would be like 1.3 million per. Smaller units near bottom could be more accessable lets say 600-700k, once you get over 800 feet you could charge low end luxory prices, and the top 500 feet they could target 5-10 million range and try to cash in with 20-30 million dollar penthouses.
I could easily a 5 billion sell through. While still bringing many accessible (not necessarily what is called "affordable"). The key here is could they build it for 3 billion? I think one of the terra firma lots in Hudson yards could make this happen.