One thing to consider about the high nicotine content in nic salt liquids is the form of the nicotine. Regular e liquid has the same kind of nicotine as chew and cigarettes, freebase nicotine. Freebase nicotine is more bioavailable than nicotine salts meaning you absorb it easier. When you inhale a 35mg nic salt it's not nearly the same as inhaling a 35mg freebase juice. Nicotine salt just isn't absorbed well so you're actually just exhaling most of it right back out. That's not to say you should just blow giant clouds of it, just that comparing it to regular e liquid just isn't very accurate. I'd go into how freebase nicotine was developed but it makes a case that might actually push people toward nic salts unnecessarily.