That’s a real pity. Stoner undoubtedly is a great talent, he could achieve much more in the future if he stays.
However, I realise MotoGP isn’t a sport for “old” like F1 is, and it’s also much more dangerous. Better quit while still physically fine rather than risking your life every weekend, particularly if you have no longer the passion.
To be honest I don’t know how someone so young can lose the passion for what he’s been doing all life, right when he reached the pinnacle of the two-wheels motorsport and when he was achieving such great success.
This however looks like a mature decision by a husband and a father. After all, Gilles Villeneuve was the same but he was stripped of his future life in his family by being in Formula 1. Stoner probably realised his family is more important than racing and that the risk was too high to take, and I admire him for that.