Do you know whether PWAs can access the local file system (which is a basic requirement for a particular Chrome app I use heavily)?
https://developer.mozilla.org/en-US/docs/Web/API/File_and_Di...
It gives JavaScript access to its very own, empty, sand-boxed VFS. However, you can give the page access to directories manually with drag-n-drop or a directory selecting input tag. So if the app needs access to just one parent directory then you're good to go. If you need the app to have indiscriminate access to the entire filesystem then you might be able to give it C:/ (or whatever other root dir) but I have never actually tried it.