[seymourhersh]

“Just make sure it can be easily replaced when needed”, implies a clean architecture of some kind - which implies experience.

Perhaps you’re just better than you realize.

[hot_gril]

Eh, if you're given a well-separated API to deal with, the code can be pretty terrible without being hard to replace. What makes it hard to replace is when someone puts a lot of thought into it and doesn't want you to rewrite it.