[nanolith]

> Alternatively if compile time is not the slow part of that pipeline, then you're prematurely optimizing the wrong thing anyway.

Developer productivity does not matter in your world?

> In other words you only optimized the critical 3% of the codebase rather than prematurely optimizing everything with pImpl abstractions?

Yes, because nowhere in this thread have I advocated prematurely optimizing everything with pImpl abstractions. Those are words you have put in my mouth. pImpl abstraction is a single tool that can be used to improve compile-time performance. Not all the time, but in a fraction of the 3% of the time where it is appropriate.