Call me confused but...
Isn't temperature control the same thing as adjusting the wattage on your mod and building a coil so the upper limit max is ideal for what you want.
Ok... So I understand the use of a specific wire as many hot plates require that (an electric stove for instance requires a specific coil in a specific burner) but to get a true non thermal regulated temperature control you would need an upper and lower voltage range (Delayed pulse width regulation maybe).
So, if I fully understand the dna 40 set-up basically for me to get the performance out of the mod I can only use a singular type of wire (Nickle Chromium 200) and even then if it miss judges my set up incorrectly then it will not work as specified however I can build my coil set up with Kanthal as I wish and with using the proper oHm's to achieve the vape temperature I wish. I think I'll stick with non thermal regulated mods for now so I have the freedom to use what type of wire I want, lord knows I've got maybe 1K feet of various kinds laying around.
Just a thought on this, or rather personal view of it all.
Not gonna lie, if the DNA40 is setup properly, the temperature regulation will extend coil and wick life, virtually eliminate dry hits and will be on paper, "safer". However, I am of strong belief that the health benefits of temp regulation are negligible, and is simply a ploy to answer to the government for certain questionable studies done where an e-cig was purposely dry hit to show how it can be harmful. Bottom line, if it affects the government's income, they'll do something about it.
Have you ever seen a DNA40 in action? It will quick fire at something really high (say 30 watts, then immediately scale itself down into the 7-8 watt range to sustain the desired temperature). This is something that conventional VV/VW mods cannot do.