The SNES is not portable, it just lies on your bench or on top of your TV all the time, so it doesn't need anything small. Hence the SWC or any other back up unit.
>>but it would beat the complexity of accually going through the SWC to play them. <<
I don't know what you find more complex:
Plugging the SWC to the comp, and downloading games to it with two or three clicks.
or
Having one small cart and erasing and uploading a game each time you want to play a diffrent one.
I think the latter is more complex if you ask me, and a flash ROM cart will wear out after 100 thousand times of erasing and uploading... A normal DRAM will hold much longer.
mikael