You want patterns that are well-known to the maintainers, but this is different from “optimizing for the new”: consistent idiomatic use of a library like XState

You want patterns that are well-known to the maintainers, but this is different from “optimizing for the new”: consistent idiomatic use of a library like XState or Ramda in a JavaScript project can cause a high onboarding cost (because the new developers don’t know the library well) without any corresponding ongoing cost.