I never could figure out Atari 2600.
All my friends had them.
My family had an Odyssey][ and then an Atari 400 and then a C64.
I couldn't figure out why all my friend's crappy "computers" didn't have keyboards and could only play cartridges but not tapes or disks.
I'm still pissed my dad sold that C64 and like 500 games.
I since acquired a C128, but I'll never be able to reconstruct the game collection.
Not like you can't easly get them from Frodo and Lemon64 but THAT'S NOT THE POINT!