What’s factually untrue?
Unburnt gas that finds its way back into the oil is what can cause the oil to break down. I’m not saying that the oil is going to rapidly break down immediately after the time interval is passed. There is a reason that oil mileage and date is listed for oil changes. However the additives in synthetic oils do last much longer now but why not change the oil anyway for peace of mind?
I have been using blackstone for a while now and they always give me solid feedback on my oil analysis. Also I’ve never had the time pass before the miles have.