This anecdote is a bit of a diversion, but...
One of our best friends retired early while at the peak of his career. He was the head of the English department of the best public school in town, taught AP English, member of the college board, helped write and grade the the AP English test, college board mentor for schools trying to start AP programs, you get the picture. A new principal decided to make life miserable for him, and did. Stripped away most of his management authority and perks, gave him low performance reviews. He was angry and crushed. Couldn't take it. I think the last straw was when she forced him to accept the "C" student scion of politically influential family into the National Honor Society. Retired at the first chance, committing himself to a very shaky financial position. He copes by smoking - way too much IMHO, and it has been going on for years. I suppose it is permanent now. We see them about once a week for drinks and hors d'oeuvres at their place and then dinner out somewhere inexpensive. During the hour or so we are at their house, he excuses himself two or three times to go outside for a toke. (his SO does not allow him to smoke inside).
When we go on trips together and he has to go cold turkey, he definitely gets cranky, unhappy, and difficult. I suspect pot is his biggest expense. It kills me, but I can think of nothing do do. Apart from the illegality, I would rather see him smoke than drink. Sorry for the downer post, but life is like that sometimes.