I’ve never really flossed. Every time I go to the dentist they say I have otherwise perfect teeth and gums for my age. But I also don’t drink soft drink or alcohol, smoke, eat junk food or sweets and have basically never done so. Pretty much everything I eat is organic.
I use a good electric toothbrush though, so generally it feels like it should be enough. If I floss even as gently as I can my gums just bleed like crazy and there’s barely any space to move it around my teeth. If I do it at night I just wake up dried with blood all in my mouth.
EDIT: I have been thinking though about getting a water flosser or whatever they are called. At least to remove any debris the electric toothbrush missed, without (hopefully) the damage and bloody mess I get with floss string.