FWIW, my main reason for requesting the recurring task option is that I'd really rather not clutter my Calendar with mundane tasks like "water plants", "test smoke detectors", "delete backups" for which a firm date is not absolutely essential. (Whether I delete my backups on Saturday or Sunday will not make a huge difference.)
Without recurring tasks, My Calendar could quickly become quite filled with these minor, recurring items (which are more akin to a "reminder" than an actual scheduled event) -- and since visual space in the Calendar is at a premium (especially in the month view, which I prefer), I would really rather not have such minor tasks take up space in my Calendar.
Instead, I would strongly prefer for my Calendar to be the home only for scheduled events that involve a fixed day/time commitment, without any extraneous clutter or reminders that don't depend on firm scheduling coordination.
Does this make sense?
Ultimately, of course, it will depend upon Chris' preference for where he puts his time and energy relative to other items on the development roadmap, so I'll be looking forward to his feedback once he has a chance to consider the feasibility of making this type of change.
If nothing else, providing the recurring task option would offer users the choice of whether a repeating activity belongs in the task list or the calendar -- and since doogiePIM offers us so many other good customization options, I think recurring tasks could be an enhancement that would be well received by many of doogiePIM's users.