I'm 80% once a day [night time] and touch wood, only ever had one filling needed and that was back in 2009. Bro sciencing it but I chalk it up to drinking a lot of water and shlooshing my mouth out after meals, especially if i've had orange juice, ice cream or other not good for teeth stuff. A bit of gum maybe too, but I don't know how much of BigGum fills our heads with random fake science.

I did have a 'uh-oh' phase a few months ago where my teeth were super sensitive, but some Sensodyne, mouthwash and twice daily sorted it out and now i'm fine again...and back to my old habits lol; enamel must of taken a lil beating.

Dentist says things are always fine, so I just keep it up /shrug

I always wondered whether it's flora and fauna dependent to some extent, so some people have bacteria that don't damage the teeth and other have the nasty ones and have a constant battle.