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

[kitler53]

bc is only really handy in the first 6-12 months of a consoles life cycle. after that i just move on entirely. but hey, i have 2 NES, snes, n64, gc, gb and ds still around if i want to play old games. ..if i want to dig them out of storage.