I believe that TC is ideal for low wattage vapers. Have you ever experienced a dry or burnt hit on an EVOD, ProTank or Nautilus? I personally have not experienced a dry or burnt hit for many months now, running RTAs @ 13-18W or RDAs up to 25W. Maybe I've finally figured out the correct builds for my attys. (!

!) I also notice the sudden drop-off of flavor/vapor when I run out of juice, long before I experience any dry or burnt hits. (Thank you, Rayon and JeremyR!) If we learn how to build them correctly and utilize our devices within their intended parameters, TC becomes less of a necessity and more of a toy.
TC is ideal for protecting vapers:
1. against the limitations of early, inexpensive equipment.
2. against manufacturers' inconsistencies.
3. against the early stages of rebuilding.
4. against overpowering devices not intended for the power we ask them to handle today (most single coil RTAs).
5. against themselves.
Until we see the results of Dr. Farsalinos' latest study, informing us at what temperature e-liquid breaks down into bad stuff, all we can use TC for is avoiding the hot, nasty extreme and adjusting to taste. Both of these things can be accomplished by learning how to use our non-TC gear correctly. Hopefully, a solid, reliable, mostly idiot-proof temperature technology will surface by the time Dr. Farsalinos releases his results.