Solid state batteries look promising. They never degrade.
I think it is easy to underestimate what an advance this is. If we suppose that a 2022 car with solid state batteries is likely to have more than 400km range (maybe quite a lot more) then consider that in 2032 you could buy a 10 year old EV that STILL has over 400km range!
Achieving 100% of new car sales being EVs will be great once it happens, but that is still a LONG way from 100% (or even 90%) of cars on the road being EVs. Being able to buy a 10 year old EV with a great range would enable the percentage of EVs on the road to climb considerably.
If you consider the environmental cost to manufacture and transport new cars, those cars being able to be driven for 25+ years brings down the average per annum environmental impact of manufacturing those cars by a lot.