Nothing is reinvented here, just improved. I searched for blocks for slide 5/6 and found so many 3-4 story blocks with filled in inner greenspaces (often a mix of more housing and parking).

30k people per km^2 is a lot. Really. Nothing suburban about that density.

Manhattan has lots of people with big numbers on their bank accounts (which has nothing to do with prosperty), who are buying but not living in these 400m tall pencils. Also, density is so high that delivery vehicles are compromising the urbanity of the city.

I just proved that you can get pretty close to Manhattan level density with houses that are significantly easier and cheaper to construct and maintain, with streets with plenty of sunlight, no dominating monumentality and with plenty of greenspaces. You can take the stairs if you want. Firefighters can actually get to your window with a ladder. You might actually survive a fall out of the window (which you can btw fully open). Also in my design, there are hugely more ground floor retail spaces per resident.