How often portupgrades?

[Kiffin Gish]

Just wondering what a good rule of thumb is in how often to run portupgrades.

I figure that once a week should be sufficient, however each time it runs it can take up to a few hours to complete which seems like an unnecessary hassle to me. Once it even started rebuilding the complete gnome port which took a couple days!

Is this worthwhile? What are the benefits?

Thanks alot in advance.

--------------------------------------------
Kiffin Gish
Gouda, The Netherlands