"Today, PlayStation revealed that its PS5 has sold 40 million units. Microsoft doesn’t share hardware numbers typically, but court documents, math, and slides from an ID@Xbox in Brazil seem to suggest the Xbox Series X|S line-up is around 20-23 million units sold globally. That essentially puts the PS5 at a 2:1 advantage against Xbox, but perhaps the split is even worse than that beneath the surface. "
Switch is the third best selling console of all time behind the PS2 and the DS. I highly doubt that most people who own switch own something else. What you’re saying applies maybe to the core gamer audience, which is honestly pretty small.
In fact, the issue is that Xbox “never”* has done it’s own thing, and because of that they are hardly relevant in the console market.
*their entire branding is “gaming box for gamers”. The only time they strayed from this was with xbox one where they for some reason decided a “DVR that can also play games” was the way to go.