Eh, I now have witnessed two cases where I asked a software team lead of a project I was working for for a precise interface or API for a planned function and they looked at me as if I had talked about going on a giraffe ride with a bunch of alien Martian schoolkids.

(And subsystem interfaces is really a subject I was taught in 10th grade by a math professor who himself had been a student of Niklaus Wirth. Maybe if you stand on the shoulders of giants, you should not be pissing on them...)