It is hard, but it’s absolutely worth it and can be made easier if you slowly transition rather than going cold turkey. No way I could have stopped without nicotine gum. Once I finally forced myself to throw my vape in the garbage and just kept using nicotine gum it was really hard to justify going back to vaping/smoking. Smoking (~5 years) -> Vaping (~5 years) -> Nicotine gum (~3 months) -> Regular gum (still using)

If there’s money to be made, then probably any defense corporation in the US.

If I had to guess, here’s a couple: Northrop Grumman Lockheed Martin Raytheon Technologies