Should it be necessary to have a PS2, PS3 AND PS4 hooked up all at once to play?

[richardhutnik]

Michael-5 said:

How often do you play PS2/PS1 games? I bet once in a while you might feel the urge to pick up a classic PS1 game, or finish a PS2 game you haven't beaten, but in general you don't play that often right? If you're going to start up a new game, most people download the PSN version instead of go out and look for a PS2/PS1 disk.

I'm more retro, I don't like owning digital games, especially because apparently PSN content on your PS3 doesn't work on your PS4, so any PS1/PS2 games you did download are trapped on your PS3 now.

I have the PS2 to play retro game content.  I do want to go back and play them, when the urge strikes.  I have a number of systems packed up in storage.  It is beneficial for me to be able to access them.