[Hokusai]

> when you know the codebase

Yes. When I was younger I worked in solo projects. I knew my code almost line by line.

In my last decade, in middle sized companies, nobody knows all the hundreds of micro-services code. And code changes while on vacation, that can be 6 weeks of the team working without you. That is not ideal, but in such a big code base it is difficult to have everyone reviewing all the changes on a single micro-service, impossible to have all 20+ teams reviewing all of each others code.

Different problems need different solutions and code styles, I guess.

[rubber_duck]

My point is that in a good code base types should be obvious from context. If you don't know the context then you will be slow (and make a lot of mistakes) no matter what the type say because you'll likely misunderstand the domain logic (context) unless it's something trivial. I would hate to work somewhere where I'm expected to randomly drop into micro services I didn't have anything to do with and debug/support them - sounds stressful.