Not only that, but CD-ROMs were not widely adopted until CD-R was introduced in 1988, roughly the same time as WWW. When CD-ROM first hit the scene, it was used to publish electronic encyclopedias and not much else.
I remember my first CD-R drive. It was at work, I had to justify it for use by the entire department of ~100 people, and not only did we have access to the web but our company was selling using our website by then. I purchased a CD-R for my nephew that christmas, he was flabbergasted to have it. It was cutting edge, it could write at 3x real time!
CD audio was, of course, very very different. And audio CD were not rapidly adopted either. Original CD players were $1000 in 1980, it was a plaything for the rich.