5.) You might not have the platforms to play it
Not all of us have access to our old consoles. Perhaps our parents hid or threw them some place where we can never get them. Some of the old systems are even more expensive since they are now considered "vintage."
Old PlayStation classics can be played on newer devices, but not all of the video games have been remastered. You can also play old titles through emulators if you are familiar with the software.
This concept reminds me of "dead media" from one of my Mediated Communication classes. Old data becomes inaccessible because of rapid innovations that change the mediums we use. Who's to say that the dominating video game console manufacturer will still be on top for after several years? If that happens, not all of its titles might be playable in the future.