> But these restrictions also reflect a substantially limited capacity to innovate They also break already existing applications and workflows – there are e.g.

> But these restrictions also reflect a substantially limited capacity to innovate They also break already existing applications and workflows – there are e.g. quite a few file formats around that don't work with the "pick a single file and that's all you can access without pestering the user once more" model: - separately stored subtitles (media players currently automatically look for those when opening a video, but with strictly sandboxed file access that would no longer work) - playlists (opening a playlist should likely implicitly allow that application to also access all the files referenced therein, but of course the OS can't be expected to understand each and every filetypes intricacies) - multi-part videos - multi-part archives - HTML documents with links to other documents and/or separately stored resources (media files/CSS/JS) - any other kind of multi-file file format Along the same lines, download manager extensions in Firefox have become semi-useless since the switch to webextensions, because there's no way to download multiple files elsewhere than the OS downloads folder without asking the user for each and every file.