I'm still a little bit skeptical because chemical energy storage is inherently corrosive and unstable and so maintaining installed capacity is more expensive.

Unlike power generation, where you can build a facility and it can more or less run for decades with basic maintenance, batteries effectively have a limited number of cycles they can be relied on for. So you would effectively have to remanufacture your entire storage capacity every 10-15 years. So scaling up on storage would theoretically get exponentially more expensive the more of the grid you take over.

Obviously battery technology is improving and each 1% gain in improvement represents drastic savings. But I think there is still lots of reason to diversify technologically and continue to look into complementary sources of base power like nuclear.