I've been working on infrastructure to support a certain class of applications (medical imaging devices) that have a lot of complex functional and nonfunctional requirements. I initially developed much of the system I own alongside the first product team which made use of my systems, and together we ran into a lot of painful issues and added functionality to support these use-cases.

Working with a new team who haven't yet shipped such a system to production has been supremely frustrating, because they haven't gotten far enough in the process to understand the classes of problems that my system solves. I've gotten a lot of pushback simply because they simply didn't have enough context to understand why you'd even care about this stuff - "Why are you bothering us with these problems? I'm sure we can figure this stuff out eventually."

But now, after working with folks for a year and a half, they're starting to come to me with questions about how to resolve certain things - and that's when I say "remember that stuff you didn't care about at all last year? fortunately my system already knows how to do that for you!"

Glad to know this is a systemic problem with humans and not a personal failing on my part!