It seems win32 has specific support for this kind of tech at a couple different layers, one that's low level filesystem virtualization that's like FUSE I guess

It seems win32 has specific support for this kind of tech at a couple different layers, one that's low level filesystem virtualization that's like FUSE I guess [1], and another that's higher level and exposes sync status of files via explorer and other win32 apis [2] which is what I assume OneDrive, Dropbox, Google Drive, etc use. [1]: https://docs.microsoft.com/en-us/windows/win32/projfs/projected-file-system https://docs.microsoft.com/en-us/windows/win32/projfs/projec... [2]: https://docs.microsoft.com/en-us/windows/win32/cfapi/build-a-cloud-file-sync-engine https://docs.microsoft.com/en-us/windows/win32/cfapi/build-a...