Not for nothing, but:

...but support for Linux can still be fairly patchy.

...

And if you’re thinking about Nvidia, their closed-source drivers have historically been problematic for gaming on Linux.

These aren't technically false statements, but they aren't exactly indicative of the current state of Linux gaming. The Nvidia one, especially, is kind of overstating how problematic Nvidia is; I don't think the author plays games on Linux much or talks to other people who play games on non-AMD systems.

Also, five games isn't much. It hit ≈60fps for two of the titles (what you'd want in a budget GPU), and Cyberpunk 2077 isn't an especially great game to use as a metric baseline, given its history of bugs.

They could be entirely right, but I would want to see more data on this, as well as better and real world tests before sounding such a note of finality.