That's what I'm saying. Maybe they don't know for sure themselves and that's why they advice to just stay on 4.1 until they doNo, they are saying 5.x is definitely exploitable but it's more "inconvenient" to do than 4.x.
If they could give a bit more info like it's a particular game you have to buy, or it required soldering etc etc. Not the full method just the type of method. That would make it a lot easier to decide whether to just update now or wait.