If Evernote had markdown support, it'd become an interesting contender for code snippets and personal note taking. But I can't understand why they insist in yet-another rich text format.
Because 99% of their users want something like Word as their editor. Try as you might, but you can't get all of them—not even close—to use Markdown to format documents when they're used to highlight, Bold button, voila, it's bold. Evernote is designed for normals, and rightfully so.