> C++ is still trying to catch up with (...)

C++ modules are indeed a mess, but you are fooling yourself if you believe that the preprocessor of all things is a compelling reason to switch. In fact, I think you unwittingly proved my point on how interest in D fizzed out the moment C++11 was released.

> if you believe that the preprocessor of all things is a compelling reason to switch

The preprocessor is an unhygienic, ugly mess. Just look at the system .h files, which should be a showcase on how to use it correctly. I stand by my assessment of it.