Vinyls also still exist because some people prefer analog sound. There might not be any substantive reason for this other than random bias.
From the article:
As explained earlier, due to the physical limitations of vinyl, there are limits as to how loud you can press a record, and because vinyl is “for audiophiles” – there is less incentive for record companies to compromise the quality of vinyl releases. As a result, many vinyl records are mastered differently to the CD release with more dynamic range and at lower volumes.
[1]: http://www.soundmattersblog.com/vinyl-vs-cd-in-the-loudness-...
Vinyls do have a characteristic compressed warmth that subjectively a lot of people enjoy. The pops and crackles that come with vinyl are pleasing to many also.