To replace old consoles with a second Xbox?

[StuntNun]

I have a TV with an Xbox One connected, and a second TV with an Xbox 360 and a PS3 connected. My four DCs fight over who gets to use the Xbox One (since it has the newest games) and don't use the Xbox 360 or PS3 anywhere near as much. AIBU to get rid of the two old consoles and replace them with a second Xbox One?

Personally I'd replace them with a PS4.

Tell them that if they don't stop arguing then no-one can play the XBOne!

Milk if I buy a PS4 then we have to start buying new games whereas with the Xbox One we already have the games so it would be a lot cheaper.

Safari they only have a limited time to play between finishing their homework and screens off time so I can understand them being competitive.