CDs have numerous advantages over vinyl. For one, you can pop a CD into your car. You can rip a CD onto your computer. Numerous systems can read CDs. Vinyl is cumbersome, and CDs are seen as superior because they are more functional.
You misunderstand me. I was not comparing CDs and vinyl to each other (although even then, vinyl does have
some advantages), but to their respective contemporary competitors. Vinyl competed with technologically superior wax cylinders and won; just as, decades later, CDs competed with the superior DVD-Audio and digital download formats and won. Even as digital downloads are now gaining in popularity, the most common format is MP3, a specification that was outdated more than 10 years ago.
The point of all this is that consumers suck at making good decisions, so I don't take popularity as evidence of intrinsic worth. I'll respond to other posts later, when I'm not on my phone.