Aye, what PistolPete said.. in southern areas there is also more worry of SHB too..
If you pull a super every time it is full, it would have to be extracted within a couple days, which would also mean cleaning the extracting equipment every time..
The best place to store a capped super is on the hive that capped it.. extract one time and have one big mess to clean instead of a bunch of little messes.