It is like this- remember when your mom wanted you to throw out those old worn sneakers, ro underwear, or ripped jeans?
And you just could not bring yourself to doing it because they were so damn comfortable?
Well that's the reason. You get comfortable with a certain racquet and have success with it-you do not want to change it, because no other racquet feels quite the same-like those jeans.
Roger Federer Pro Staff 97 Play test video