That was obvious. One of my friends told me an anecdote about a seventies bass guitar player who had a fantastic funky sound - rattling and distorted in the perfect way. The other bass players was very keen to know the secret, but none of them could get a straight answer from him... just as if he didn't know. Then one day one of the other bass-players asked him how often he changed the strings on his 30 year old bass, and he said: "Are you supposed to change the strings?"
I know some pros change them for every show. I'm a little lazy, but I got for good quality strings that last well
Didn't know you had to change them that often! I play the piano and those string stay where they are.
New strings have a brighter sound that some people love and some find their sweat corrodes them quicker.