im "Drive it like you stole it" so, maybe in a few weeks I wanna check the brake pad %green bar on the main dash is a pretty good indication - but I don't know that porsche "promises" that's a complete picture - the Porsche braking system are free to mix friction braking in with regen at any time they deem "fit"…
since I've owned the vehicle starting in July 2020 - and including track driving - the blending is pretty seamless - and only occasionally do I feel that I can tell when there is friction being "added" to my "regen"…
however without access to the internal data channels - one can never really know if one's perceptions are accurate…
I am fairly confident however than when I've maxed the "green bar" and continue to apply pressure and get additional deceleration the _ONLY_ place that additional deceleration could be coming from is the friction brakes…however that situation rarely comes up in normal use…