I'm curious but will totally forget to report back in a few months when mine wears out. I'm... not sure, but somewhat confident that it starts to limit the more

I'm curious but will totally forget to report back in a few months when mine wears out. I'm... not sure, but somewhat confident that it starts to limit the more aggressive brushing modes once its "worn out", although it's possible it was just gummed up internally with toothpaste residue. Last time I changed the head on mine (Philips Sonicare), it definitely felt significantly more powerful with the replacement head.