Whether it's mechs or regulated, 6 or 200 watts, should you find your sweet spot, that's what you need to stock up.
Up until the FDA published the regs, someone using a ProVari 2.5 with a Protank was often told here that their setup was obsolete and inadequate. I suspect many lower wattage vapers didn't participate in ECF much as there was little interest in or discussion of their preference.
The game has changed from new shiny to survival for many here and which way you like to vape has become less important than making sure you can continue to vape in the future. The original ProVari design's proven durability, smooth power delivery and price has made it very attractive under these circumstances for many lower wattage vapers.
I feel lucky that I found my sweet spot at lower wattages a few years ago and go through about 9ml of 8mg liquid a day - with a top coil tank on a ProVari 1, 2 or 2.5. I get a full day out of one 18650 and it occasionally is used to pound a nail sticking out of my fence. It's the best tool for me.
Different strokes for different folks!