Last I checked this doesn't work on iPhones. So this is a non valid solution.
Also, there is no reason not to support both hierarchical folders and tags. Folder hierarchies give a better overview and it's easier to group them under a common subject and them split them into sub categories, It's way easier for me to find my way to an old note I didn't even know exists in this way. It's also way quicker to just put a note in a correct folder than it is to try and remember which tags I used on some earlier notes a while back in an attempt to group them together.
The fact that this and (other features) has been requested over and over gain since 2008 is so FRUSTRATING, Evernote ignores so many simple to implement requests like "Different Colors for Highlighter", "Control Which Image Shown in a Note's Thumbnail/Snippet View" and "Password Protected Notebooks". Either completely say no to them and give a believable and thorough explanation why not or just implement it. I can tell you if a another worthy note taking program showed up I'd switch in a heart beat just to spite you for not listening to your userbase requests.