For me, it may be that the toilet paper roll needs to have the open end away from the wall. I don’t want to reach under the roll to take a piece! That’s ludicrous!
That or my recent addiction to correcting people when they use “less” when they should use “fewer”
I always view that one as meaning that you must learn a lot about something in a short amount of time in order to use it effectively, where shallow learning curve, in a positive context, would mean you can make it useful without knowing all that much about its full capabilities.
That’s my take too. Short for “this requires you to follow a steep learning curve, even if it is not easy to do so.”
Whatever that is, it’s not a learning curve. Ebbinghaus defined it in his classic work.