Comment by skydhash

Debugging can be a joy when dealing with a single system. Not so much when dealing with things like microservices where every combination has a possible failure scenario related to that bug. And because of the deployment strategy, you can't easily test that combination in isolation. Also no tests for each service, only full integration tests that takes a while to run.

I know distributed systems can be a pain to reason about, but I think every node should be capable of being tested in isolation, at least to be able to partition errors (either the node, or the distributed nature of the system)