Maintaining libraries in multiple formats are a bad idea

Library authors shouldn't maintain header only/ header source/ module libraries in one repo. It is a bad idea.

First of all library authors assume if tests succeed on header only format it also works on modules, which is not correct.

Second, the compilation and packaging becomes very ugly, it looks similar to c++ standard versioning macros. Like a project should only compile on one standard, and the other users should either stick to a version/branch or kick rocks.

It is very pleasant to just use modules for libraries, everything is clean. By adopting a support everything approach, library authors harm themselves first and then everyone else because everything lags down.

https://redd.it/1sufvwe
@r_cpp