If people think that this season isn't a sign of that happenning to Hamilton imminently then you haven't seen his solid wins over the past decade. He has been making more mistakes.
And its nothing to do with it being one of the only times in the last god knows how long he doesn't have the best car. ******* off into the distance from the front of the grid most races means that you don't take risks and any mistakes that you make are usually not so serious.
Hes also fighting a young driver in a faster car who won't back out of any battle. He hasn't made many mistakes this season either really. A few of them have just been 50:50s and they are more stark due to the effect they have on the championship.
If I had to make a prediction, this is the last WDC Hamilton will feasibly win.
It may well be. But not because he is over the hill but because he has won it all and was looking like retiring at the end of this season previously. If Mercedes aren't at the top of the pile under the new regulations I reckon he will hang up his boots.