errrrrrrrr… it seems to me that the question relies upon the actual efficiency of the default FF conversion method… the onion.

If the onion proves to be more economical than any given thermoelectric solution then thermoelectric solutions can never catch up, right?

And if a thermoelectric solution can economically make use of even the leftover heat from the onion then that solution theoretically can just replace the onion, right?

Or is this all just a rehash of Aeronaut’s meme that an FF without an onion or thermoelectric solution still has a future as a replacement for other heat sources?