I miss video game cartridges.
They were sturdy and more fun to handle. No need to worry about fingerprints or gingerly placing them in a tray or slot. Just jam those suckers in your console and away you go! Heck, you could dropkick those suckers across the room if you didn't mind getting grounded.
The amount of space is limited only by cost. You could have battery backups and even custom chips (remember the Super NES's FX chip?). They were faster too! No installing and rarely any loading!