> They're written in the style that Carmack describes, and I have methods that span more than 1k lines of code.

I don't think that's the kind of "inlining" being discussed -- to me that's the sign of a program that was transferred from BASIC or COBOL into a more modern language, but without any refactoring or even a grasp if its operation.

I think the similarity between inlining for speed, and inlining to avoid thinking very hard, is more a qualititive than a quantitative distinction.