I have a Sonicare toothbrush and still see gunk accumulate when I use floss

I’m incredibly lazy about dentist appointments but whenever I have gone they’ve seemed happy. I’m pretty sure the Sonicare is magical.

flossing work on very deep part, so brush can't replace them.

I still floss, but you're spot on with the Sonicare. I wonder if there's a way to track Sonicare usage and dentists making up new stuff to sell you since general dental hygiene improved.