Doesn't matter for me. I hardly get much deep sleep due to anatomical issues essentially blocking my airways. I can't afford the surgery (even though I have insurance) nor will my government contribute to it (even though it would increase my productivity multiple times over, meanwhile they throw trillions at universities offering useless degrees). But yes, we have a culture that doesn't value sleep. I know of people…
Can be done by an an Audiologist.
Make sure to also use the lubricant as well (helps with comfort and importantly blocks more sound). Price I paid was under $100. Bought a 2nd pair. They are great much better than the temporarily sound plugs (not to mention cheaper in the long run).