I play more than 3-4 different games at the same time. Or rather, I alternate between the games I play. Some times I play a "set" of games, other times I play other "set", depending on my current mood. There are even rare days in which I play half of my game collection.
And even if that wasn't the case, having all the games you own in a single drive and ready to be played at any moment is much more convenient that having just a few ones in your SD and needing to "swap" them. What if I feel like playing a specific game just for a few minutes, but don't think I'll be playing it the following days?
Not to mention that copying GC games to your SD and swapping them wears it out too fast. Also, why force players to buy a SD with plenty of GBs if you can help it?
See my post just before. I really don't get how SD turns out to be a problem for some as I can't get how it is possible to own so many games and be unable to buy a decent SD card for a mere 25 euros that would allow you to play up to 20 games uncompressed at the same time.
Or is it just a case of having the whole 500+ game collection ready to play just in case some friend pops in at your place ? Basically a case of showing off your collection...