[henson]

Author here. This is fascinating to read! I (naively) assumed that things were better across the board prior to any of the tech booms. I lived in SF and commuted to San Mateo which was a non-trivial trip (coming from the tiny UK) and the BART/Caltrain combination was horrendous for different reasons (Caltrain was unreliable, BART was dirty). I did notice that a lot of the Caltrains were old Japanese trains from the 80s. Also, my rent here in London isn't that much different to my rent in SF, but I'm told I got very, very lucky there. Thanks for reading!

[dboreham]

I don't remember anything prior to the mid-70's but I have a distinct impression that cities everywhere in the western world were much dirtier and crime-ridden in the past (things began to improve around the 1980s, or Rudy Giuliani time).

[ghaff]

That's certainly true of the US in general. The standard narrative is that it was driven by "white flight," which in turn reduced investments in urban infrastructure, etc. Like many narratives, there's some truth in it but it doesn't really account for the fact that at least some Western European cities were also dirtier and more crime-ridden than today.

Giuliani was elected mayor in 1993, which did line up pretty well with New York getting cleaned up a lot. However, this was a more general trend even if it didn't apply everywhere (e.g. Detroit).