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It is not looking good for Toyota's all-solid-state battery (ASSB).

They just announced that it won't be until 2030 when you can expect them in actual production cars and only in a small-scale then (10,000 limited-production vehicles).

They announced their partnership with Idemitsu to manufacture their ASSBs.

They use a sulfide powder for the solid electrolyte like Solid Power does, which is coated as a slurry and then cooked. The rest of the battery is the same as in a conventional lithium-ion battery minus the liquid electrolyte and porous-membrane separator, using a carbon (with some silicon) anode and an NMC etc. cathode.

The main problem with the ASSB is durability (cycle life). As the solid-state cells expand (during charging) and contract (during discharging), the solid electrolyte between the anode and the cathode tends to crack and ruin the battery. To circumvent the problem, high externally applied pressures and even high temperatures are often necessary, which could...

Safety last?

Tesla workers report explosions, concussions, and grisly robot injuries at Texas factory - The Verge

Various factors, such as Toyota's intentional manipulation of supply, high gas prices, canceling of federal, state, and local credits, high base MSRP for Gen 5, dealer greed, etc. turned Toyota Prius Prime from most affordable into most unaffordable mainstream car in America.

Six New Mainstream Cars Now Priced Out Of Reach For The Average Buyer | Carscoops

Greedy Toyota Dealers Make Prius Prime A Budget-Busting Bet for Buyers | Carscoops