I disagree with the basic premise of this thread.
First, I don’t agree that digital recordings of LPs sound indistinguishable from the originals in all respects.
Second, I don’t agree that the reason LPs often sound better than digital recordings is euphonic distortions or colorations.
Addressing the first point, in my experience, digital recordings of LPs can sound extremely good and can be indistinguishable from the original at a superficial level. But over the longer term the digital recording suffers from the same issues as all digital recordings - a slight sense of artificiality, a slight sense of remove from the musical event, and a sense of unease which is so slight as to be almost unfelt. These differences are not apparent on an A/B comparison, but do become apparent if listening over a longer time period. This is not to say that digital recordings of LPs (or digital recordings per se) cannot sound good or be enjoyed over the longer term; they certainly can, but it is a different experience to listening to a purely analog recording.
Second, it is true that LP playback involves many distortions and colorations, introduced by the various stages of equilization, the physical process of playback, including tracking distortions and the mechanical movement of the stylus in the groove, the and the additional gain stages (amongst others). But I believe for most listeners of high end vinyl systems, vinyl remains preferable despite these obvious issues.
The distortions in vinyl are often only too audible, and yet we tolerate them precisely because vinyl does seem to recreate something of the original performance that digital somehow does not capture. It is not that vinyl sounds better because it is adding something; it is that digital is still not yet able to reproduce something essential in the musical experience. It may be timing errors and pre or post-ringing, it may be aliasing artifacts, I don’t really know. Digital has improved remarkably over the last decade or so and is extremely good. At a superficial level it really does sound "transparent" to the source material; but at a deeper level many of us continue to have a sense that there is still something missing. And that is why we still listen to vinyl, despite its obvious limitations, distortions and colorations - we listen through these because it still captures something essential which digital has not quite been able to do yet.
If it were true that people prefer vinyl because of additive distortions and colorations, then this would be relatively easy to demonstrate. Digital recordings on LP would sound just as good as analog recordings. But they don’t. Digital recordings played back as LPs still sound digital - they still have that sense of artificiality, only with LP’s distortions added as well. And it would be possible to add LP-like distortions and colorations to digital files to make them sound like LPs. I have seen many attempts at this and they have all failed - they still just sound like bad digital recordings, and nothing like good analog playback.
If digital recordings of LPs were in fact indistinguishable from the originals, and the reason people prefer LPs is because of additive distortions, then I would agree that this would be a strong argument for the superiority of digital playback. But I do not think those premises are correct, and the reason many - though not all - discerning people with good critical listening skills and good hi fi systems prefer vinyl is the inherent limitations of digital, not the additive distortions of vinyl.
