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An advantage of backing up every (couple of) hour (or at least trying to), is precisely that you maximize the chances that the backup manages to run to completion at least once a day. (I'm talking as a laptop user that moves around quite a lot)
Because if I have only a couple of scheduled backups, it then becomes highly probable that you cannot backup fully (ie. without having to stop before the end) each day.
That brings a touch of obliviousness to the process of backing up that contributes to make TM successful.
I appreciate the technical superiority of the Smart Update vs. the way TM works (in particular, SD seems to be much faster, at least from my experience these last days, ie. typical run is less than 20 minutes in the background).
But it seems that this scheduling story is very much a subjective matter of taste, with not much technical difficulty behind. (I would imagine that adding a periodic scheduling would be a very easy addition for someone that was able to write the whole backup software).
So why not leave that up to the user? It can even be a very hidden possibility ("Advanced..."), but at least it should be easy to activate and configure for a user that purposely wants to have this behavior. No?
-- Éric
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