Maybe it's possible that Sal's experience of vinyl was brought to him on lousy sounding equipment, so he never heard what it could really do.
I have. Here's the rub---if one is into the "vinyl experience", LPs for the sake of LPs, selecting LPs known to be of high quality and playing them back on perfectly aligned gear---the experience can be quite fine. If, on the other hand, one is a music lover seeking out a decent copy of a favorite piece of music, things can head south mighty fast.
Consider the following. I am a fan of classical music. Angel records, the USA outlet for EMI's classical offerings, was consistently inferior to the UK equivalents which were blocked for the most part in the USA. In fact, the 1970's importation of DGG and Philips LPs (previously pressed by Decca USA and other companies) was considered a big advance for record quality, with quieter surfaces and fewer warped records. Meanwhile, at the same time, domestic budget classical labels---Seraphim, Victrola, odyssey---produced inferior products compared to the full priced products. Similar problems were happening with pop productions. It wasn't until the introduction of CDs that there was anything like a level playing field. If one was pursuing LPs known to be of superior quality, there usually wasn't a problem. But bog-standard Columbia, Capitol or RCA product was generally poor. Warner Brothers tended to be above average, but they were the exception. Capitol and RCA LPs frequently were warped, Columbia's reissues frequently had far too much treble. Those with superior playback gear had fewer problems, but they were in the minority. A superior turntable would have an easier time of tracing a warped record but the peak warp wow would still be plenty audible. Not to mention the wow of off-center records. Superior playback gear still had problems because of the inherent flaws of the medium. While it may be possible to make LPs with perfectly flat, perfectly centered and noise-free surfaces, in practice that was rare.
I worked a lot in record stores, also CD stores. Lots of defective returns at the LP stores, few at the CD outlets. That should tell you something. I have owned lousy sounding LP playback gear, I have also owned excellent, properly tuned and aligned LP playback gear. The bottom line is still the same, the media determines the sound quality: one is less likely to get good results with LPs than with digital formats. It's possible to get good results with LP playback, but with a lot of LPs, it is not at all possible.