The most important piece of jigsaw left is writable local file access api. Yet, no energy put to do it! Security shouldn't be a stopper but a thing to be solved

The most important piece of jigsaw left is writable local file access api. Yet, no energy put to do it! Security shouldn't be a stopper but a thing to be solved, probably only allow installed pwa app write with little cute settings widget like on mobile to see which apps have accessed to local machine's storage, showing path, usage size, etc. It's like conspiracy to leave Chrome do it alone. Strange!