I am constantly amazed at how many people I meet in Saigon who have been doing the same thing, often in the same place for a very long time. A few recent examples are below.
Street barber. 23 years.
Artist. Mr Cuong. Painting for 40 years, mostly from the same arcade in District 1.
Cyclo driver. 25 years from under the same tree, and if you had been peddling a cyclo for 25 years you would take a nap too!