Just 2 cents -
Not that long ago we were super impressed with regulated mods that could fire in the 3-15 watt range. 15 watts? Wow! But... we were also running tanks with tiny +1 ohm coils. Vaping 12mg or 18mg juice was semi-reasonable because that gear put out small amounts of vapor by comparison with today's popular sub-ohm gear.
I strongly agree with the sentiments above. If you are using sub-ohm gear that vaporizes massive amounts of juice, for your own health sake, you need to adjust nicotine dosage down to the 6mg to 3mg range (0mg is a good goal too, but that can come later). Keep in mind those values apply to classic ejuice, aka freebase nicotine.
What has changed is the introduction of nicotine salt. I won't rewrite the changes to nicotine salt, but that type of juice often comes in higher concentrations of nicotine, delivers nicotine into the body quickly, is meant to be vaped at low power, small coil, and the important part... it's meant to be vaped a few puffs at a time, then put it down for a while.
Nicotine poisoning is a real thing. I am convinced vaping is better than smoking, but people still need to use these products wisely. If there is any negative to vaping, it's just that it's all too easy to over vape. With ciggys there is a sort of built-in impediment, my lungs hurt, I am coughing, my mouth tastes like crap, I am going to put the smokes down for a while. With vaping, more of the responsibility is on the user to slow down.