"Building a monolithic app allows you to crutch bad behavior and poor design without having to understand the realities of software. You can ignore scalability, clean architecture, concurrency, data modeling and graceful failures."
I 100% agree with you. I have found that monoliths, no matter how militant the architect is, will eventually have bad behavior slip in. It is the path of least resistance/junior programmer where someone will eventually shortcut the interface.
In micro services there simply are fewer ways to cheat. The only access a service has to another service is through the defined interface. The service providing that interface must also now support it as is going forward - the opposite of brittle. As you mentioned above, when dealing with another micro service the programmer must think about failure all the time, which is what they should have been doing anyways!
Thinking in micro services from the start is not that hard, but untangling a monolith can be very hard. Micro services came out of people realizing that huge monoliths are impossible to change because over time all the bad practices that crept in make them impossible to reason about.
There's value in enforcing separation of interface and implementation. But tooling can do that without needing the hair-shirt of putting a network connection between them.
I 100% agree with you. I have found that monoliths, no matter how militant the architect is, will eventually have bad behavior slip in. It is the path of least resistance/junior programmer where someone will eventually shortcut the interface.
In micro services there simply are fewer ways to cheat. The only access a service has to another service is through the defined interface. The service providing that interface must also now support it as is going forward - the opposite of brittle. As you mentioned above, when dealing with another micro service the programmer must think about failure all the time, which is what they should have been doing anyways!
Thinking in micro services from the start is not that hard, but untangling a monolith can be very hard. Micro services came out of people realizing that huge monoliths are impossible to change because over time all the bad practices that crept in make them impossible to reason about.