No, and why would they? (Tesla has said that at this time they don't know how long it will last or if it will be permanent.)
Their obligation ends when the warranty ends. Does Mercedes replace the transmission, torque converter, and radiator when the radiator fails after the warranty period is up and it destroys the transmission and torque converter? No they don't.
Why would they?
(1) Because it is a known defect, of materials or manufacturing. (I do not care which, the distinction does not matter to me)
(2) Because rather than repair when obligation was clear but root cause was unknown, they pushed their customers to wait until root cause was known. For me this is 1.5 years. Perhaps a lawyer can tell me: at what point does it become actionable material degradation of product sold, when we are exceeding 25% of a car's warrantied lifespan?
(3) Because they claim that ~20 years into a world with high volume manufacturing of flat panel display technology and nobody having ever seen anything like this before on said same technology, this "is not a defect and not covered under warranty".
(4) Because now they offer a bait and switch to temporarily mitigate the damage, rather than replace: "reduce the yellowing condition for a period of time". And to add insult to injury it is offered as "a one time goodwill gesture", and lest you think that perhaps they're just weasel-wording around this to be careful, they add a whole additional sentence: "Please note that this is NOT a treatment that removes the yellowing condition permanently.".
So let me get this straight, Tesla... I wait 1.5 years for you to put a bandaid on my gunshot wound as a goodwill gesture?
This message indicates to me a few things:
(a) They are very scared of the field impact in terms of cost
(b) They are very unsure that the fix is a fix. The last sentence seems to indicate that they have experienced failures, either to fail to fix or fail again after some time.
(c) This is not a particularly high priority to them, and they are likely attempting to run out the clock.
(d) Some attorneys are going to buy a small island from the end result of all this
I like (and want to like) Tesla as much as everyone else here. But this is indefensible.