Are all (or even most) compounds and delivery devices made this way?
The major brands like Kanger, Innokin, ELeaf etc all seem to offer temperature-controlled devices.
The thing many may not understand is that when the temperature comes anywhere near the temperature required to produce toxic chemicals in any significant amount, the vapor tastes bad!
I mean, really, really horrible! That's one of the (other) things they never mention in these "studies" (along with precise details of the testing protocols/conditions etc). It's why people use and enjoy vaping on gear/devices with no temperature control, maybe just a voltage or voltage/wattage (selectable) control. The byproducts produced by even mild overheating taste extremely bad to the user and typically start to occur at far lower temperatures than where really possibly-problematic types & levels of toxins are produced.
People must remember that there are 3 big powers who would like the vaping industry and vaping gone. Government, as smoking brings in large amounts of taxes, particularly State taxes, although tobacco is also taxed Federally as well (plus it's another area to extend government control into and employ more government bureaucracy & enforcement to oversee it), 'Big Pharma' stands to lose from 'smoking-cessation' products they sell as well as all the drugs/products used in treating smoking-related diseases, and 'Big Tobacco' because fewer people will smoke and more will quit.