TCES is extremely cheap (megajoules per dollar of rechargeable capacity, compared to tens of kilojoules per dollar for batteries) and will likely be critical to the energy transition, but it won't run your servers overnight or your airplanes over the Atlantic. Things like cycle life are still an issue for TCES. And you need electric power to run your TCES system, so efficiency is still a concern.

I feel like oxidizing methane to methanol shouldn't be rocket science, especially if you have an unlimited amount of energy to use. NADPH does it at scale already. A few more cheap process steps would give you nontoxic ethanol instead.