I pretty much accepted it as "this is as good as it gets" kind of thing. Happy that my O2 levels weren't going in the toilet and the 4 to 5 pee breaks in the night and the morning killer headaches were gone.
Then a couple of years into therapy I had to go without my cpap one night because I traveled to Vegas and totally forgot the long hose and nothing could be done about it until the next morning.
I got a taste of what untreated sleep apnea could make me feel like....it wasn't pretty.
I got a rude awakening as to just how bad I could feel and I realized that things had improved a lot more than I thought.
The improvements were so very slow and gradual that I just didn't notice them...but I sure noticed the return of some really ugly stuff that one night without cpap.
My sleep quality was crap...lots of wake ups...more peeing...and woke with nasty headache and just felt like total crap all day.
Had to drive clear across Vegas to find the one and only medical supply store open on a Sat on a holiday weekend...and spent $30 for really cheap generic $5 hose anywhere else...and it was the best $30 I ever spent.

At some time in the future you may be in a similar situation where you have to sleep without xpap....there's a good chance that you will get a similar rude awakening as to just how bad things could be and realize more improvements than you might think.