detuning/ loosening the strings after play to promote guitar longevity is a misplaced understanding. the guitar was set up at the factory to accept the string tension.
if you employ standard tuning & utilize a heavy gauged string set, you are better off not removing/ loosening the strings. if you do so, the neck would revert to a string-free tension state where there might be warping. unlike guitars, basses are more susceptible to this reaction.