I love vinyl! I guess I can see how if you were starting out today it wouldn't really make economic sense to buy vinyl, but for me it doesn't really make sense to invest in either cdj's or Serato, since I already have had decks for nigh on 15 years and in any case I can't afford too many new records now that I'm a dad. But that's besides the point, since obviously with vinyl I (like a lot of the other people posting to this thread) love it for aesthetic reasons that don't have much, if anything, to do with economic efficiency.
This is what I wrote about vinyl a while back in a blog post:
(A big part) of what I enjoy about mixing with records is the feeling that I am physically interacting with the sound. Part of the process of mixing is touching the record, not just scratching back and forth at the cue point, but drawing a finger along the platter to slow the record and twisting the centrepoint to speed it up. When I do these things I feel like I am literally taking the beats and dragging them into place – that the beats have not just a sonic but a physical presence, one that I can touch and mould to my taste. I find something intrinsically aesthetically satisfying about this process.

