Yes exactly, I agree. I think energy storage (a solution for the renewable energy intermittence problem) occupies the same unique space that bitcoin miners do, and both of these will fuse together, transitioning between whichever is more profitable in any given hour, hell maybe even less, in any given block period. We should assume photonics (for microchips/silicon) will be standard within the next 20 years as well. That could mean there is no significant competitive advantage amongst mining silicon since the limit will always be the size of a light wavelength (photon).