Noted, but I still stand by my experiences, limited that they are, that careful driving at appropriate speeds, will not destroy the standard tires when operated outside of their normal operational temperature range.
Pirelli's web guidance is limited on this, but I found no descriptions as to what they, specifically, consider to be their Ultrahigh Performance Tires. If this was a large an issue as suggested, they would provide more guidance, so I posit that it's not as large an issue as some are making it out to be.
At the end of the day, the 19" tires are the base, standard tire, selected by Tesla . . . is Tesla providing them on cars delivered to cold weather locations out of a desire to kill their customers?
Of course not.
Also: in the real world has anyone we read even ONE report, on ANY forum thread, demonstrating any of the extreme outcomes feared by some here?
Not to my knowledge . . . .
That said, YES, for normal, daily operation in extremely cold climates, the use of appropriate tires is recommended, if not required.
Let's see what the future holds, but I suspect this is much smoke where there is no fire.