This article about Tesla's second quarter note to shareholders is most interesting.
Musk makes the point that storage will halve the need for power plants EVEN WITHOUT RENEWABLES, because we have had to build extra power plants to cope with high demand at peak periods. Batteries can do this better, and cheaper. Add renewables to the mix and most power plants will be redundant. And before you mock the man as too optimistic, recall that 5 years ago Tesla sold as many cars a year (800) as it sells in a week now.
There is a limitation, though: how rapidly we can deploy storage? The output of Tesla's giga-factory is now already committed for the first year of its life, so that is the true constraint on switching to a coal-free future. It's not the cost of renewables, which are now cheaper than new coal plants. It's not the cost of storage. Tesla has solved that. It's the supply of batteries.
It matters, because the world continues to warm. Once again, the latest month's data (for June) were the hottest ever. The 12 months moving average shown in the chart below shows a sharp spike to new highs.