A note to Evernote ;)
The lack of this feature is why my company chose Quip over Evernote. And it's why I am finally getting around to moving my personal Evernote content to some other (yet undecided) service.
I've been a software developer for quite awhile now, and no, just no. Things as simple as moving deeply nested subfolders around, dragging and dropping files from one folder to another, become a painful exercise in trying to rename tags.
I'm sure EN made an early mistake in software or db design that makes this feature nigh impossible, just letting the product team know that it is affecting your bottom line.