I hardly ever floss. Only when necessary is where I fit. I do it when I have something stuck that bothers me. I am about ready to turn 51 and have had two cavities in my life. My dentist always said my teeth are great. When I do remember or think to floss "just because" I rarely, if ever, get anything out from between my teeth. I guess I am just lucky.
This is where I am. I'll floss if something is bugging me, like I can feel something in between. Maybe I do my entire mouth once a week by happenstance, where I target something I feel, get that out, but then I'm like, well I already have the string out, may as well do em all.
I have 1 filling I got in when I was like 10, but nothing aside from that. End of every visit my dentist tells me how awesome my teeth are looking.