[dunfear]

Most system can have a single server today and it will basically always be more simple than N smaller ones. Everything is just faster if you just skip the TCP layer. Less configuration, less attack surfaces, less possible problems and issues. The CI/CD and backup is a lot easier as well.

It is as another author wrote: It is a people problem. We programmers like the "do one thing" mantra so we tend to want to add it everywhere - even in places were the cost may outweigh the benefits.