

Yeah, I don’t think the phrase “learning curve” has any built-in suggestion, even culturally, to imply that the reasonable default assumption is one way or the other. I only ever heard learning curve to refer to something getting easier after awhile, which is indeed a valid curve
The problem is the location of the steepness makes the difference between whether this means it’s easy first and slow progress later, or slow progress first and easy later. Is it like, x^1.5, or is it like ln(x)? Both are very steep at some point.