PC and Nintendo gamers have it great but they're always left out of the conversation and many resent that.
In terms of game sales business, we have Apple, Google, Android, Sony, Microsoft, Nintendo, Steam, Ubisoft own subscription, etc. All competitors, true. But it's no surprise that when the analysis is about PS and Xbox, the other ones, like Google or Nintendo, are left out. Xbox is the only device that can directly impact PS sales and vice versa.
Switch is a gaming console in formal sense, but it's actually something else in terms of library and technology. You can convince anyone to buy a Switch, but it's tough to convince a Xbox owner to buy a PS and vice versa. That explains why they focus so much on each other. They're each other's main threat.
God bless You.
When PS4 will hit 100m consoles sold: Before Christmas 2019
There were three ravens sat on a tree / They were as blacke as they might be / The one of them said to his mate, Where shall we our breakfast take?