I find that usually when people write "Full stop", it's best to just stop reading there in most cases.
It comes off as "I am correct, how dare you think that for a moment I could be wrong".
I'd love to use Wayland, but until it works properly on Nvidia hardware like X11 is, then it's not a viable option for me. Of course, then someone always goes "Well then use an AMD card" but money doesn't grow on trees. The only reason I'm not still using a 970 is because a friend of mine was nice and gave me his 2080 that he was no longer using, along with some other really nice upgrades to my hardware.
Honestly it's one of the biggest issues I have with the Linux community. I love Linux and FOSS software but the people who go around and yell at anyone who isn't using Linux, and the people who write articles like this who try to shame you for your choices (something that is supposed to be a landmark of using open source software) only make Linux look bad.
There's a difference between someone kindly telling others that X11 is not likely to receive any new major features and bug fixes (which is the right thing to do, in order to inform someone something they may not know) - and then there's whatever the author of this quote is doing.