I'm very skeptical it will ever take off: the wear and tear of your high performance, high density, mobility optimized battery that has a unique vendor that tig

I'm very skeptical it will ever take off: the wear and tear of your high performance, high density, mobility optimized battery that has a unique vendor that tightly controls the spare parts market for maximum profit would be much more expensive then intra-day price differentials of the energy market. On the long run you are effectively competing against industrial scale storage operations that use exceptionally large infrastructure, optimized for low cost, lower density chemistries (Sodium instead of Lithium), with charge profiles optimized for very high number of daily cycles, or even multiples per day etc. So even if grid battery storage becomes the main thing stabilizing the renewable grid, it still makes little sense to use your car for that, except in emergencies, a "virtual energy supplier", you are paid for the availability, not the actual delivery.