Not in my experience. The only concern would be keeping your gums from drying out due to cottonmouth, but that's a concern shared with combustion too.
I floss once a day and, usually, only brush my teeth once a day too (unless I eat something sugary or sticky). I also go in for regular dental checkups, and they say my teeth look good.
Keep in mind that one's dental hygiene, as with any body care routine, is specific to that person. YMMV.