I find it very frustrating that I cant edit my attached office files, e.g. Excel-files, without having to make a copy and add it in the note. It would be so nice to be able to the open the attached file in Excel, make the changes and then the attached file is updated in Evernote. This works in OneNote that I use at work and I find this very useful. I know Evernote isnt a file manager but I do belive it makes sense to keep some files there and it also makes sense to be able to edit them in an efficient way.