I still don't understand why you insist they will use "prior gen process" in that factory. Their "prior gen process" has proven to be unable to produce BEVs profitably. Toyota lost money on every BZ4X and RZ sold, and their only profitable BEVs are badge-engineered local designs like BZ3 and BZ3X. Why would they intentionally lose money?
And we have every reason to believe Toyota no longer has the best process in the industry when they fail to solve the Type 21 V35A main bearing issue 4 years after that variant of the engine launched (and we still don't know if the original Type 17 V35A has the same problem, just because there are so few high mileage LS500 out there). It's definitely not a first model year problem and we still have no conclusion on whether it really is a flaw in the production SOP or the fundamental design of the engine. And now we also see A-pillar weld point failures, fuel tank punctures, and rear crash beam failures on the ES, and electric door lock failure on the LM. Their recent track record doesn't inspire the same level of confidence in the brand like 5 years ago.