There is a fantastic inside-view of Kowloon Walled City from this 20 minute BBC documentary (1980):

https://www.youtube.com/watch?v=ooQjAYJQ-xM

If you're ever in Hong Kong, I highly recommend taking a few hours to explore Chungking Mansions, the spiritual successor to the Kowloon Walled City... not your typical tourist attraction, but one you'll remember far longer than most.

I was right outside this afternoon. Someone offered me a tailor, then cocaine.

I can vouch for a really great tailor right off nathan road if anyone needs a recommendation, friends of the family for over 10 years.

But what about the cocaine?

Having gotten hosed in the past by a Shangainese tailor (largely my fault - wasn't nearly specific on my ask), I'd actually really appreciate the reference. Contact details in my profile if you really don't mind.

Stayed there many times, I always thought it'd get closed down or re-developed at some point, but it keeps on trucking.

Hehe, I stayed in Chungking Mansions a couple of years ago and it's definitely an experience!

There is also a really nice interactive explorable article from the Wall Street Journal here:

http://projects.wsj.com/kwc/

In his video he made for Magnasanti [0] (which I really recommend watching by the way), Oscala did mention that an earlier version of the city was in fact inspired by the Kowloon Walled City.

[0] https://www.youtube.com/watch?v=NTJQTc-TqpU

The Cheating definition includes A.I software. Made me think A.I is our hope in real life city planning.

Can AI help us defeat nimbyism?

No, ai will help expend it

I think you mean "expand". "expend" is more or less the opposite of that.

The video in the article mentions Kowloon Walled City as one of the inspirations for the design/layout.