The Thailand number is suspect to me; while provincial outages were common, I do remember outages in the capital as well. Maybe it has gotten better over the years.
The US I can speak much better about. We have significantly worse reliability than we should. Both overhead and underground infrastructure is significantly less robust than it should be, and urban vs rural doesn't seem to make a huge difference. An excavator took out about 8 blocks of power for 48 hours at my old office, which was a capstone to years of unreliable service. That was the result of consolidating and overloading systems partly due to roadwork and partly due to growth in the area. "Excusable", but very poor planning. My current home has significant outages frequently. The primary driver here is an undersized right-of-way for the utility leading to excessive spacing between poles, and tree encroachment, and ultimately underinvestment over the past 30 years.
In Sweden they are doing a wholesale grid replacement in places; infrastructure installed in the 60's is obsolete so they now are putting in a whole new medium voltage network, and even replacing low voltage service laterals in many cases. I can't imagine projects like that ever being undertaken in the US, beyond small isolated areas.