And yet, not match would have changed. Aside from a few major western cities (and specific major areas in them too) most cities in 1900 didn't even fully have electric lighting back then, nor central sewage systems, and tons of other stuff.

Technology wise, 1900 cities more like 1000 BC than today. 1000 BC wasn't some cavemen running around, we had established civilizations, with writing, education, math, literature, laws, etc already in place.

But you have hindsight. That thought experiment is more interesting in the other direction. How lost are you when moving forward in time?