

It isn’t open source hardware. It is license-free IC architecture.
The hardware will still be closed source in 99% of cases, but the architecture is “open” and can be used without licensing, lowering the barrier to entry for making CPUs (it is still very high as volume is the name of the game at fans. Tapeouts for testing a design can be €1k on the very cheap end, often more like 10K+)
A step in the right direction for sure, but open source IC designs are still quite limited.





They should be the default for solar installations and grid-level storage, but are too new.
They can also replace lead-acid batteries for many applications.
Lithium will still rule microelectronics and wearables, but all lower density stuff should switch to sodium.
That being said, for cold environments like Scandinavia and the US Midwest & canada, sodium ion works better in both cold and heat swings than Lithium variants that it might be worth the tradeoff in capacity because in the long cold months, the reduced capacity and performance of lithium chemistries would completely close the gap anyways.