I mean don’t people ever ponder this?
With rounds, I do change strings relatively often. If the bass is being gigged, I change strings every 6 months...at New Years and Fourth of July, it's easy to remember.
But I treat flats differently...they stay on until they break or won't play in tune.
Perhaps I’ll find out one day if I live that long and also hold onto a bass that long without really playing it.