For any successful consumer product, 10 percent adoption tends to the inflection point. That is the point at which adoption sharply accelerates. That has tended to be the pattern for mobile subscriptions as well.
So it would not be at all unusual to predict that 5G adoption, in any market, will hit an inflection point at about 10 percent adoption. That is basically what a forecast by GSMA Intelligence implies.
You can liken the 10-percent adoption to the shift from bleeding edge innovators to “early adopters,” which is about what 10-percent adoption represents. The key point is that adoption rates tend to accelerate after the 10-percent adoption point is reached.