This is probably because those developers haven't added support for opening files in place, which has been available since iOS 9. There are a few other things (e.g. the way you call open/save dialogs) that need to be changed if you want to add support as well.
redeeman|2 years ago
gotta give apple credit, while the rest of the world is reduced to lowly CopyOnWrite, they took it one step further, with CopyOnRead.
scarface_74|2 years ago
Doctor_Fegg|2 years ago