If you are implying that we can go back to force inlining everything and only using small wrappers around memcpy then I will have to say that that ship has sail

If you are implying that we can go back to force inlining everything and only using small wrappers around memcpy then I will have to say that that ship has sailed years ago. I do not know anyone who wants to go back for more than brief moments while changed header causes cascade of rebuilds. Now the elephant in the room of build times that no one wants to talk about is 'the optimized' build with PGO+LTO. I think none of the projects I worked that got used to it ever did a local pipeline to do it xD. But if you ask people if they want to ship a build without it the answer is clear 'no'. I will totally understand if authors of the linked article also do not like to talk about it. What I am trying to do here is to clear confusion about importance of it. Pretending that IWYU is more than polishing of last 5% of build times helps almost no one. YMMV ofc.