How long can they possibly last? I saw an Ed Friesland video and he was playing a bass with 10 year old Labella ss rounds! 10 years! Can rounds really last that long? Which last longer, nickel or steel? I'm thinking of steel for one P bass and nickel for the other. I love rounds. Maybe leave a steel set on for a long time on one and change the nickel set periodically? Thinking of Labella steel and Daddario nickel. Yes?