Is 100% success your level of success? I think a nice font that assists users with low vision level is an excellent idea which I said and I thought the font was very well designed.

What happens when your vision is too poor to read even the best designed font?

At that point 100% success is an unrealistic level and so a discussion about how smart assistants work or even other assistive functionality is a fair discussion and one the author did not mention at all.