CPAP for me was life-changing.
I had sleep apnea when I was young, skinny and sporty. Then I got old, fat and sedentary and of course it got worse. I was falling asleep while driving.
I tried a CPAP machine and could not stand it for more than 10 minutes. However my apnea got worse so that I actually did not want to fall sleep because I did not want to wake up choking and gasping for breath. Literally a nightmare.
So I forced myself to stick with the CPAP the whole night through and woke up refreshed and alert. I cannot live without it.