It seems unlikely that the file system would disappear/become inaccessible altogether. Sure, when you want to edit photos you should have to dig around in fold

It seems unlikely that the file system would disappear/become inaccessible altogether. Sure, when you want to edit photos you should have to dig around in folders. But existing apps already insulate you from these details - just by layering suitable abstractions over the file system. Having the more general layer underneath gives you more power when you need it. It also gives all apps a simple, standard place to store their data. The raw file system has been slowly losing its prominence over time, but I really don't see a benefit in scrapping it altogether.