you should read up on renewable costs as they have changed dramatically this decade. Utility scale solar and onshore wind are now cost competitive with (or better than) fossil fuel generation, especially for new generation. There’s a detailed report linked with a lot of good info.
the cost of storage continues to decline rapidly as technology improves - the hope is we can have the same decreases in cost of storage as we had for generation to make renewables more viable as a larger part of the grid given their current problem of being intermittent resources
and the useful life of renewables continues to increase as well. The problem has actually been more with new technology being that much better that it’s often a wise economic decision to replace the turbine with the latest rather than maintain the older generation one.
Levelized Cost of Energy and of Storage shows that as the cost of renewable energy continues to decline.
www.lazard.com