I can't help but think this is impressive

Crimson Skies. Across four Xbox console generations. Playing together.

Photo: Modern Vintage Gamer

Spanning 19 years you can play multiplayer games with any combination of Original Xbox, Xbox 360, Xbox One S|X, and now for the first time Xbox Series S|X but utilizing System-Link - a form of multiplayer gaming that was introduced in 2001 with the Original Xbox and still supported in 2020 with the Xbox One.

Video included after the break...