> Modules promise to significantly change the structure of C++ codebases and possibly signal headers’ ultimate demise (but probably not in my lifetime). It also opens the door to potentially have a unified build system and package manager, similar to Rust’s Cargo package manager; though I imaging standardising a unified build system would be one bloody battle.

I wonder how many folks, like me, have stopped using C++ because it's too much effort to manage the build system and the overhead of headers adds too much to compile time?

An enormous draw for alternatives, like Rust, Zig, Nim et al is that they simply don't have these problems.