The main thing here is that engineers act according to the principle not "as ordered", but "as it should" (a reliable solution). And then it will turn out like this... bloomberg.com/tosv2.html
Samsung may not only match Toyota's ambitious solid-state battery release date, but may also offer its cells at a cheaper price and with a higher manufacturing pace. So far, price and production rates have been the biggest obstacles before mass solid-state EV battery adoption.