OK, let's take an absurd example for instance:
I Like to Move It (DJ Dero NRG remix) <- real title
I Like to Move It (and I Like 2 Remix It 2) <- imaginary, read as (and I Like to Remix It too)
Guess case would catch 'Remix' and lowercase it, which isn't correct. It's no longer a descriptor but part of the title...
To an outsider it's confusing. And in my collection, I'd end up having titles with 'Remix' lowercase and other(s) uppercase. No shades in my collection, that's for Photoshop