Its been a past criticism of Gmail service too, when it introduced the 'no-folders' concept. "All inter-galactic mail in one single inbox folder. You must be kidding." But slowly, one gets used to the fact its just a different way of organizing mail, and quite an efficient one at that. So if you just get your head around a new approach like Grexit, you can save the overhead of using multiple project management tools, task queues etc, and save on their respective learning curves as well. Everybody knows how to use email.