He has taken good decission on his retirement. He is too old now to play cricket and that to compete to young generation. Also there are enough talented bolwers coming now.
There are also some other points on his retirement like he did not get enough chance to play in this world cup. He should thanks to Rahul as he had been selected in this world cup. He also offered the special thanks to Rahul in his goodbye message, which we appreciate highly.
After all good luck to Kumble. Thank you very much for serving Indian cricket for a long time.