The article I linked acknowledges this, and talks about it. Remember that like with Moore's law, there will eventually be hard, physics-based walls past which we will not progress without entirely new technology paradigms, which aren't guaranteed to be discovered in any finite amount of time.

I'm glad it's getting cheaper, and I'm all for supplementing baseline load with solar, wind, and hydro, but I'm less confident with strategies that ultimately boil down to placing trust in improvements that we may or may not reach.

That's not an assertion that reaching, say, $10/kWh for storage won't be possible, but I think it would be wise to have a plan B in case we're unable to get it lower than, say, $100/kWh.

Not having a Plan B and placing almost all of our eggs in one basket (fossil fuels) is how we got to this point in the first.

.. Last I read even the automotive industry had trouble sourcing batteries. Would be interesting to know how many minutes(seconds?) of electricity we could store in all batteries produces last year should we go all in. This at least battery storage seems naive at such scale.