Way too many mistakes? This can't be true. Every season he has 1-2 blunders as every goalkeeper is supposed to have, even in his prime. Who remembers Buffon's blunder vs Chievo in his 1st season after a corner kick when he dropped the ball, blunder vs Atalanta in 2004/05 when the ball went straight under his leg, then vs Lecce 2 years ago, etc... It is not all due to his age, but undoubtedly he pulls magnificent saves every year, gives confidence to our defense and he is still among 3-4 best goalkeepers out there. Certainly isn't at fault for plenty of goals. Absolutely invaluable asset to have.