Say you wanna swap one module for another in one of your cutters in your Broadsword Mercenary Cruiser.
If the module and cutter are on the same side...
Exit the well. Five minutes.
Drop the module on the cutter. Two minutes.
Enter the well. Five minutes.
Grab the module from its bay. Two minutes.
Exit the well, again. Five minutes.
Drop the module you just pulled from storage. Two minutes.
Recover the first module. Five minutes.
Enter the well, again. Five minutes.
Transfer the module to storage. Two minutes.
Exit the well, last time I promise. Five minutes.
Recover the second module. Five minutes.
Put the cutter away. Five minutes.
48 minutes total.
Grabbing the module from opposite side storage means you have to get the other cutter out of the way, but that can happen at the same time as undocking the first cutter and will be done before you get the first module dropped.
It's a chore.