I'm not sure if you are considering the patterns actually used in "Clean Code" architectures... which create a lot of, admittedly consistent, levels of interfac

I'm not sure if you are considering the patterns actually used in "Clean Code" architectures... which create a lot of, admittedly consistent, levels of interface abstractions in practice. This is not what I would consider simple/kiss or particularly easy to maintain over time and feature bloat. I tend to prefer feature-oriented structures as an alternative, which I do find simpler and easy enough to refactor over time as complexity is required and not before.