The function log(x) also has derivative that goes closer and closer to 0.

However lim x->inf log(x) is still inf.

Is it your assertion that an 'infinite' percentage! of the businesses will use AI on a long enough time scale?

If you need everything to be math, at least have the courtesy to use the https://en.wikipedia.org/wiki/Logistic_function and not unbounded logarithmic curves when referring to on our very finite world.