I think Tesla tries to get away with the least effort - in the first instance.
In the end they do the callback or offer an upgrade, as we can expect for such an
expensive product.
If they had been aware that this emmc chip get's worn out quickly, they would have
designed an easy swap module (e.g. like a fuse or similar).
But they simply weren't.
It cannot be in their interest to spent two hours of work to switch a $5 chip.
-Especially as the service net is still weak and they don't want third parties to step in.
Actually we own a 2015 Model S and a 2021 MIC Model 3.
When I see the different MCU performance I am pretty sure that the $1500 MCU2 upgrade
offer for MS/MX is worth it.
So if this ends up to be Teslas way to solve the problem, it may be acceptable,
no matter what their legal team claims.
What worries me more is what happens to the battery pack in case of failure after 8 years?
Do they still charge $15k (or whatever) for a new one or do we have to try to get a used one?
Or do we even get stranded on the graveyard - no more battery packs for "old" MS/MX?
Our Model S turns 6 now and is in perfect shape, only very few repairs so far.
So with a new MCU I am sure it would drive another 6-8 years (or even more, only 16k miles annually).
Sure, to upgrade to a 2020 or 2021 (plaid) Model S would be nice, but doesn't really bring an
advantage with respect to our habits, that may justify to spent another $30k-$60k.
In 2-3 years when bunches of MS/MX get > 8 years old we may discuss if a battery pack is
a wearable part, too.