So there are at least two people in the world who are tech savvy and are too stupid to have "discovered" this feature. IMO the average Joe isn't either and will be thrown under the bus if tags aren't implemented consistently & predictably (so you don't have to "discover" how they work for each app). As it stands right now it means education and additional costs.
Yes. But then I'm not saying they shouldn't be implemented consistently and predictably, so I'm not sure what the point you're making is. Also, I wasn't talking about "right now", I was talking about a future in which the file system is abstracted away from users. Which is obviously not right now.