Pondering this more since last time. There is something that a vinyl playback system does to the sound that isn't part of the actual music signal that seems to have a salutary effect on the playback experience.
As I've thought about this thread, I think there is an artifact with vinyl that really adds to the frison of the sound. It will seem crazy: when listening to vinyl, take a listen to silent moments - before the first song starts, between cuts, etc.... and those silent parts still produce something that is perceptible - the noise of the groove, the stylus interacting with the LP, the step up circuitry, whatever, that seems to add some low level ambiance that is pleasant. (On Kind of Blue, records seem to add an effect that enhances the feeling of space or place vs. digital experiences I have had with that music.)
Obviously, this is not really part of the musical content at all, so I am praising LP playback for a flaw, really, but it's something that seems to maybe alert the ear that something sonically cool is happening, or, who knows, maybe low level 'rumble' creates a false sensation of enhanced space (like a good woofer can do,) I dunno. It's hard to try to put my finger on it, but since we are all friends here, I thought I'd toss it out. I think vinyl artifacts maybe tend toward being a little euphonic.
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Edited to add: maybe there is a characteristic of vinyl playback that acts like 'dithering' on digital playback to make the sound more enjoyable. (Could vinyl artifact be introducing some low level random noise (like dithering) that makes us able to feel as though we hear smoother sound and add the sensation of 'preserving detail?'