[schumaml]

The fontconfig cache is created on all platforms - it's just that this step is usually done when installing the system or adding new fonts from the package manager for your average Linux distro. Granted, it also works much faster there in general.

Adding a few new fonts for a specific project does not cause long delays on any platform.

A compounding issue was that file locking issues prevented successful cache updates on the Windows platforms until recent versions of fontconfig, this lead to a long startup time on every start.