And the 40% of the city that are Desi immigrants also enjoy that improvement? There were very nice things in the city 20 years ago (and all of the cities I listed); they just weren't available to a major chunk of the population. I'm skeptical that that part has changed in Riyadh?

Things did definitely improve for them though the gap remains. Still, the gap does not mean it’s dangerous. I haven’t been to Riadh but if it’s similar to Doha/Dubai, then you can walk into a worker’s neighborhood at anytime with no consequences.