Featured Volkswagen is going with solid state!?

Not much there about what the dynamics are as to longevity, cold / hot environments Etc
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https://www.marketwatch.com/story/quantumscape-volkswagens-battery-making-unit-hammer-a-new-deal-in-solid-state-quest-96b6e620
Volkswagen subsidiary PowerCo gets serious about solid-state batteries - electrive.com

I think this agreement is mainly to pump up the valuation of quantumscape's stock. VW is a major stock holder, and if these work both companies will profit. The pilot line is scheduled to begin mass production in 2027, but this will be relatively low volume. Note 2027 is also the year toyota says they will sell a vehicle with their own solid state batteries. If these work well and prices are low enough then PowerCo will build manufacturing capacity. There are no timelines or commitment on VWs part to build or use these batteries, but with their partial ownership of quantum scape they likely will if they perform well enough and cost low enough. Tests with the prototype batteries went well.

I hope they are successful. If they are I would not expect that gigafactory to start high volume production of solid state batteries until 2031. In the meantime I expect Lithium Iron Phosphate to grow in market share and prices to continue to fall.

New QuantumScape Solid-State EV Battery Exposes EV Sales Flop Fakery, Again - CleanTechnica
my guess is if this 40GWh factory starts volume earlier it will be using quanumscape's semi solid tech, not all solid state. This is different than the gel semi solid, since it uses a solid electrolyte on the anolde and a gel on the cathode. These give higher longevity given current solid state progress.

That is other quantumscape papers and anouncements.
Temperature in Battery Development | QuantumScape

They operate well in hot environments. They claim to operate pretty well in cold environments and like my tesla they can heat the battery to operate better. VW seems to claim the prototypes operate well, but again we don't have anyone without a financial interest verifying this.

PowerCo confirms results: QuantumScape’s solid-state cell passes first endurance test | Volkswagen Group

 

agreed
the irony - god forbid musk should remotely say anything construable as pumping up tesla stock ... that tends to quickly bring down SEC's hammer.

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Musk isn't sly about it.