Why only the files edited by a human? What about edge cases where changes made by a program, such as a linter or auto-formatter? Those aren't guaranteed to be integrated into an IDE.
That's all right if they are not integrated into an IDE. The typical scenario is: a file is edited by a human -> linter/formatters run -> 60 seconds delay -> the file is backed up. Therefore, debouncing has a handy side-effect of letting linters/formatters run before a version of the file is stored.