I’ve experienced significant battery degradation with Tesla. Supercharging almost all of the time. Tesla have to eventually limit the level to stop even more degradation. A life of supercharging has a significantly greater impact than using home and fast charging. I personally wouldn’t buy an older Tesla with a history of constant supercharging. For most people though who most of the time fast charge, rapid charging being the occasional longer trip it will not be an issue.
My views on this subject are the very same.
Battery degradation is going to happen one way or another, that is pure fact and can not be avoided.
But extensive rapid charging will degrade the battery faster and therefore shorten its life span.
It will not happen overnight, but it will creep up on the cells slowly in the back ground.
Tesla Bjorn has covered this behaviour extensively in some of his videos.
Given the mileage and testing he has conducted over the many years of EV’s - I would find it extremely difficult to argue with the evidence he has discovered.
For many EV drivers, we will NEVER come close to testing to the level he has done.
But to cover over 100,000 miles PLUS in various EV’s - He has to be charging from a rapid unit more than most people.
I think it is safe to say, he knows what he is talking about.
It was him who was one of the first people to spot the charging speed reduction in his Tesla.
He is constantly monitoring almost every trip and quickly picks up on any behaviour changes on the cars he is using.
Currently he has access to his old model S again and is checking over defects the car has after covering over 150,000 miles now.
If it’s worth knowing, he know’s it !.