alt Hacker News> or they had other requirements that necessitated microservices
Scale
Both in people, and in "how do we make this service handle the load". A monolith is easy if you have few developers and not a lot of load.
With more developers it gets hard as they start affecting eachother across this monolith.
With more load it gets difficult as the usage profile of a backend server becomes very varied and performance issues hard to even find. What looks like a performance loss in one area might just be another unrelated part of the monolith eating your resources,
Exactly, performance can make it necessary to move away from a monolith.
But everyone should know that microservices are more complex systems and harder to deal with and a bunch of safety and correctness issues that come with it as well.
The problem here is not many people know this. Some people think going to microservices makes your code better, which I’m clearly saying here you give up safety and correctness as a result)