I sometimes ride with a very fit, fairly quick (hard to know how fast he is because he can easily drop me, and then he's just gone ... ) who likes to stop for a vape break in the middle of a long ride.

Same deal as that which others describe---former smoker who switched to what is essentially a health-neutral alternative.

He enjoys vaping, he enjoys riding, he pretty much enjoys life. People who enjoy tearing down people on the internet for not being clones are just having fun in their own ways.