It's changing to a subscription model, or at least thats what they're also offering in the US.
I can't see it ever being transferable to your new car, just like optioning a sunroof isn't, and thats how Tesla see it, part of the car. The irony is we wouldn't have the complaints if it actually delivered real value as we'd get it back on the resale value. When aircon or automatic gearboxes were extras you either got more at sale time or the lease prices made an allowance for the retained value and you don't pay for the whole lot over the term, that doesn't seem to be the case anywhere really at the moment.