I’ve got two fluffies - one indoor and one outdoor. The indoor kitty has always sucked a grooming, and we found her much happier after she started getting clipped. She loved how much she could feel the petting now! She didn’t get matted too badly, but super dandruffy and petrified poop butt. She now gets clipped roughly ever 3 months.
The outdoor fluffy cat does alright. He only gets one or two matts every few months, so I just cut them out. And he’s pretty tolerant about being laid on his back so I can trim his belly furs!