Earlier quoted context omitted.
This is tangential, but Kia declined to cover an engine failure, under warranty that was extended by recall, because I had not done an update. Edit: I eventually recovered most of the cost via a settlement court.
Even more tangential: Kia declined to cover an engine failure, under warranty that was extended by recall because I change my own oil. Kia's engines are known to fail predictably even within first 100K miles. They extended their warranty because of it. But then they weasel out of it unless you hire an attorney and go to war.
If this were a widespread policy I bet class action lawyers would be all over it without you having to pay for it.