Interesting that they took out the hospital/clinic ? Seems like it would be useful. In the US there are 'golf course to the grave' type communities for adults who want to go smoothly from the 50's into the afterlife. And when I was a teen I read Silverberg's book "The World Inside"[1] which postulated the "Urbmon" a complete community in a single structure. That has always fascinated me, the question of "Can you build a carbon neutral self sustaining human community?" I presume you can but how effective would it be? The Barbican looks like an interesting take on mixed use.

[1] https://en.wikipedia.org/wiki/The_World_Inside