this post was submitted on 09 Jul 2023
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Microservices architecture by itself doesn't guarantee making anything better. Making services smaller doesn't automatically make easy-to-understand code. That's why a lot of companies that didn't pay attention to what they are doing went from monolithic architecture to "distributed big ball of mud" or "distributed monolith". Just like any other architecture pattern, for microservices to work, the team needs to make conscious decisions to overcome the challenges specific to their architecture.
We only get this if we do microservices correctly. That's more or less the whole point of my comment. In many cases, teams rush into splitting their monolith into smaller chunks and call it a day. Without proper monitoring, orchestration/choreography, service boundaries, tooling, etc. microservices will drag a team into territories where they will lose control.
No, I don't believe that. However, I also don't believe people who write spaghetti code will start writing better code just because now they are writing smaller components. If the team has good coding hygiene, they will produce good code whether it's monolith or microservices. But you have a point. If we are talking about components that are 200LoC, it's more difficult to produce spaghetti (or easier to recover from it). I'm not sure that's the norm, though.
As a final note: I'm not saying microservices are bad, or monolith is better than microservices. I'm just trying to introduce some nuance. I have been part of a microservices transformation and I think it was successful. But we met with many challenges along the way that were not immediately obvious from the beginning. To quote one of the pioneers of microservices architecture: