Well that was an interesting read. This thread seems to have devolved into a debate about the relative superiority of tagging over folders a la PlayStation vs. Xbox, PC vs. Mac, Star Trek vs. Star Wars, Android vs. iOS.. [need I continue?]
The reality is the features don't have to be mutually exclusive; you can have both and it would:
Add to the multitude of creative ways to use Evernote by having the two systems complement and enhance each other
Allow users to choose for themselves which organizational system to use
Extend an organizational system that almost everyone is already familiar with into Evernote
Add another potentially tier-able feature to entice users to subscribe
Is there something to be lost by adding this feature?