I have the kit to Sub oHm, a Sig 100w+ which holds 2 18650 Batteries, I use Samsung 25r, I tried 0.8 oHm on a Dripper and nearly Choked myself I'm happy Vaping around !2w-15w on a Kayfunalike and a Lemo Drop Coiled between 1.2 oHm and 1.9oHm. That keeps me happy.
I was a VERY heavy Rollie Smoker 18 months ago, and if I began Vaping now I would be convinced I'd need to Sub-oHm at 50+w, I think a few Newbies may go down this route though.
It took me over a Year to figure out the difference between a Shit 18650 2200mAh Battery and a DECENT, reliable 18650 2200mAh Battery, and that was just for Mechs. I think the Vast majority of Vapers will never want to use 30w+ or go below 1oHm once they try it, the problem arises when kit to achieve Sub oHm High Wattage is cheap as chips, but Batteries to do it with safely are expensive.
My twoppenorth!