I'm very curious as to what is the longest time someone has gone without changing strings (given they play regularly and don't just leave the bass in a closet for 20 years). I'd also love to hear what 20 year old strings sound like. I know there is sometimes a huge debate over when to change your strings, but let's keep this friendly and just say everyone has their own taste in tone.
Personally, I've never liked the sound of new strings, even after being broken in for a few weeks. That is just my taste; no argument here. Half of my basses (all acquired used) have never even had new strings while in my possession. I've only ever purchased three sets of bass strings in my lifetime. The first set when I was a beginner and thought I needed to change the strings. The second set, because I wanted flats on my fretless. And the third set because a G string broke and I didn't like the gauge of the set that was already on the bass anyways. Besides that, the rest of my basses have been pre-owned and I have never changed the strings on those, plus who knows how long ago the strings had been changed before I purchased these basses.
Please answer the poll as to how long you have gone without changing strings. Also please specify if said bass has been played often, or left in storage for years. Thanks!