Extremely helpful: Nygard discusses the challenges, downsides, dangers of moving to microservices, as well as the benefits.

"Microservices are a technological solution to [the problem of] 'How do I scale my development team without paralyzing development flow?' … [They] are the result of failures in our operating systems, languages, and frameworks. Basically, the goal is fault isolation and independent deployment. …They're a good idea when you need independent deployment across multiple teams."