I doubt that even among fanboys, you'll get many people that'll go through with it. Tattoos and piercings are fringe in every modern society.
You are framing injecting implants as futuristic and people avoiding this as anachronistic. That is sort of a dishonest way of distorting my argument, I'm not saying that there is a cultural momentum preventing this, I'm saying that people will not adopt this because it hasn't got enough advantages to outweigh the downsides. Opening a car or paying with your hand is just a novelty, it's not substantially different from having that functionality in a separate item. Do you understand it's not a new ability it's just a different package.
I clearly stated that the calculator-chip had to have the feature set of a scientific calculator, not just a basic one, you would benefit from this too, I sincerely doubt you can do very advanced maths entirely in your head. The main point is about reducing the mental effort as well as improving accuracy, it's not really about speed. I'm not sure how to convey this: consider that you could in principle look for mathematical patterns in every object you look at, but usually you don't because that would be very exhausting, and that's the bottleneck this would solve. Just consider that people could have accurate intuition for stuff that involves large numbers because they could calculate probabilities in their heads, with such low effort that it would feel like "intuitive knowing". You can't really dismiss ho much benefit this would bring.