As someone currently dealing with pricing changes for DDR5 volume contracts (admittedly, only ~30k DIMMs, but still), those contracts are a lot less rigidly priced than we (engineering) realized at the time - “agreed price” is a lot more... flexible... until the pallet is delivered. Especially because our contract is with our manufacturer who has their own contract with a DIMM manufacturer who has their own contract with the DRAM manufacturer. DRAM is substantially more like a spot market than the average consumer would expect (at least at my volumes). The same is true for my HDDs (~100k unit/year contract) and my CPUs (10k unit/year contract). At least for HDDs our contract quantities are getting honoured (and we actually still have Seagate and WD fighting for our business), which I’ve heard hasn’t been the case for smaller orders.

For a while, yes. But I'm sure they will want to sell it for longer than a year or so.

Even Samsung is running into this issue now: their own internal foundry is refusing to give them a long term contract now so the S26 series will become more expensive.

If this happens to Samsung, what leverage will a player like Valve have?

That's their costs, not our costs. Regular PCs will cost more, which means Valve can price their consoles higher and collect margin, because there's no other competition/substitutes.