You can go your whole life listening to music without realizing that equal temperament tastes stale. Just intonation tastes intensely sweet and ruins you for equal temperament. The instrument is supposed to resonate like a bell. This is one more reason why you should own your music, so you can fix the tuning. The only audio files of copyrighted music are equal-tempered vibratoy crap and it's illegal to make in-tune versions.