We’ve purchased an annual subscription for my 85 yo (long time retired) inlaws. They use it daily. They ask their doctors insightful questions and get better care. They planned trips with it. They get recipe advice. I don’t know how much more penetration it should have to be considered mainstream but it certainly feels more widely available and used than what Google was 25 years ago, despite having a subscription model.
Not sure what you mean? If the recipe is not right it is no major problem but so far all was great. Their trips and questions have been on the spot and it has helped them dramatically.