Besides offering the best temperature control, enails also provide a whole host of other benefits. As in, they really eliminate having to use butane as a regular heating source. Even though butane is relatively easy to find and buy, having to consistently maintain a gas surplus is far from a sustainable idea if you ask me. Most times access to electricity from a plug is no less than 3' away at any time from your rig.
Enails don't require much power to operate and can last for hours, delivering endless dabs to all the homies who can keep up. For those who have been to cannabis festivals, most vendor booths that offer samples will do so with the accompaniment of a dab rig/e-nail setup.It's clear that there's no other way that you can take so many dabs at such a controlled temp in a row.