As mentioned in the title, I would love to have this feature in order to optimize my productivity.
I'm not sure Adobe would ever implement this feature, but do you happen to know if there is a script for that ?
var scpt = 'say "Processing is complete."'; app.doScript(scpt, ScriptLanguage.APPLESCRIPT_LANGUAGE);
On Windows, you would need to use a similar VB command if any.
What sort of tasks are you thinking of? I presume background tasks like exporting, but can you provide some examples?