Hard to say. They could have fiddled with the rules to make it really unappetizing and kill the market, or slowwalk every last thing (how many vaping products have been approved?). It could have taken many more years and been a lot worse, which is a tragedy for the many, many old people who seriously need it.
(Like my grandfather. I also appreciate it, because while OTC hearing aids are - for now - too weak for my hearing loss, it's providing much more competition for the prescription hearing aid oligopoly and I'm benefiting indirectly. The jump between my hearing aids from 2017 to the pair I bought this year is the largest jump in quality I've heard in my hearing aids in like 20+ years.)