I don't think people so much prefer mathematically perfect sound quality; people want convenient music. MP3s are less than the "mathematically perfect" quality

I don't think people so much prefer mathematically perfect sound quality; people want convenient music. MP3s are less than the "mathematically perfect" quality of CDs, but far more convenient. A few hundred bucks spent on quality speakers and the quality difference between an MP3 file and a CD/WAV/FLAC will start to become apparent. But quality speakers aren't anywhere nearly as convenient as earbuds. Don't get me wrong, I love the bright sparkling highs and powerful rich lows a CD through a quality set of speakers can bring, which vinyl can't. But I can't take all my CDs and a pair of 3-way drivers and a subwoofer with me in my car, on the bus, on my bike, at work, while grocery shopping, etc. But I can conveniently achieve a reasonably good listening experience in those environments with my phone, a collection of MP3s and an aux cable or a pair of earbuds.