Again we're talking about 6,000 GWh of grid storage for just one country. And that's also competing with batteries for EVs, and batteries for electronics. That site estimate's for storage necessity are also pretty optimistic. Most estimates for a completely decarbonized grid - not using peaker gas plants - call for weeks of storage not days: https://pv-magazine-usa.com/2018/03/01/12-hours-energy-stora...
And again, battery production is scaling like crazy. That is an undeniable fact for now. You're the one speculating that it will suddenly stop, and you have presented flimsy evidence at best. Your entire argument falls apart if batteries continue scaling at a reasonable price.
The only logical choice is to assume that the battery industry will keep doing what it has been doing, unless you present some strong evidence to the contrary, which you have repeatedly failed to do, as has been pointed out by myself and others. The commodities are behaving as expected, which is to say that they're rising in the face of new demand, since supply hasn't had time to catch up.
You're proposing that the sky is falling, but it looks just fine to the rest of us.
