Yeah, best of luck with that on the stock cooler - which is what 99.9% of Ryzen buyers are going to be using..
To quote Gamers Nexus: "The chart starts at about 84 degrees Celsius, which is where you might be sitting with a 3900X with the stock cooler and with the average, modern case. ..a 55-degree load temperature is achievable primarily with high-end cooling solutions"
Any boost from such expensive cooling, in gaming, is pretty much unnoticeable in play. So his results are still valid, especially for the most common usage experience. And the "lows", which is all that really seems to matter with these modern processors, was still very well covered, IMHO.