The 40 is probably a typo, the cities number is closer to 400. I don't think the microservices is about repo too big in a technical sense. The problem is when

The 40 is probably a typo, the cities number is closer to 400. I don't think the microservices is about repo too big in a technical sense. The problem is when you have 100s of engineers working on a single repo, just merging changes or building , testing etc. will take all day. Microservices are more a solution to scaling engineering teams with a lot of people because they can work independently rather than a technical scaling thing.