I know I seem like sort of a hard-ass when it comes to stability requirements, but it doesn't do us much good if we list unstable clocks in the chart as stable. The whole idea is to give people a realistic idea of what are fairly reliable trends. You can see the discrepency, too, as I did even with one 1090T I used. It would run great at 4.2 GHz. I played games and whatnot. Turns out it wasn't actually fully stable above about 3850. It would do a reliable 7-10 minutes before crashing most of the time, so it was probably a heat management problem. People like us tend to run chips like that all the time. "Seems fine for daily use" but not actually stable for one reason or another.

WCG is a good test, but it's hard to translate its usage scenario into a formal requirement for validation. It doesn't really have a "prove to the user it ran full tilt for x hours" burn-in mode that can be nicely captured in a screen shot.