> But is that really essential? Sounds a bit like the typical Java developer who works with giant spring applications containing classes with hundreds of method

> But is that really essential? Sounds a bit like the typical Java developer who works with giant spring applications containing classes with hundreds of methods spread in many files in a 10 layer deep folder structure. It's not only your stereotypical Java developer who has to maintain large code-bases. There are much more monolithic code-bases than there are micro-services. Also, probably you have a much better memory than me, but I, like many others have trouble working with random objects with no contracts. Additionally, try using a library like io-ts and you also get validation against types. Typescript made me love JavaScript again.