So I got an email back from Ed recently addressing the Electric version...
First, he is not giving up on it and hopes to come up with something soon, but he has a few serious engineering challenges:
1. Heat Up time - as we know from other electric vapes (evo, sub, logs, etc), they take some time to get up to temperature. Electricity doesn't seem to able to harness the raw power of a butane torch. (Me, I used to waiting 10 minutes for my Infinity to heat up and willing to do the same for Supreme, but I am a very patient Zen type person).
2. Unit body temp and leaving it on - if you've ever accidentally touched or even gotten near the heat exchanger, you know how hot it gets. Now picture it inside any type of enclosure. Such high heat would even over time degrade most materials that may be used as a housing, plus there could be other serious implications, safety and performance wise, dealing with this heat.
I know that the v1 had some type of cardboard and/or leather sleeve that helped with this. An auto-shutoff could assist with heating too long, but that may trade-off increased heat up time between uses.
I did embellish the above a bit, all Ed basically said was " heat up time" and "small space heat enclosure if left on for a long time" were the basic challenges.
There are many smart minds here who can maybe come up with suggestions to solve all of these issues, if that's you, post here and maybe send Ed an email and we can all help make the electric Supreme a reality.