No, because the filesystem is one layer of abstraction lower than the registry. There's nothing with less bottleneck to the filesystem besides raw device access. The registry runs on top of the filesystem. If you wish to use the registry for filesystem-like purposes (eg storing startup config specific to the app or user state), just use filesystem. If you wish to use it like a database for system-wide information, that's a better use-case, but the registry isn't quite a proper database.

Windows programs proliferate $HOME junk, too. And that's an issue in its own right, which should be addressed by platform-specific application dirs (e.g. the platformdirs library for python).