Rammy Blue said:......he doesn't like working outside his comfort zone.
Yea because Mourinho wouldn't come in and sign Droba despite him being 31, Scolari didn't sign Deco despite him being over 30 and unlikely to adapt to the prem, Benitez didn't buy average Spanish speaking players like Riera and Arbeloa despite them being average, Wenger doesn't stick to his youth policy so he has an excuse for failure.
Face it all coaches prefer their comfort zone.