This can be a forward compatibility concern: imagine we run a company, and our product is a GUI app written in C or C++.

If we also believe that the desktop GUI apps are a thing of the past, and in the future everyone wants only web apps, we'd want to pick a C library for the UI which allows building for the web, for the future scenario where we have to port the app to stay relevant.

The scenario might not materialize, but having a contingency plan sure feels nice.

Maybe it was a personal goal?