What are some modern day poor people foods that you think will become gourmet (or at least widespread and popular) in 50 years?

Things like lobster and brisket used to be considered cheap foods for the poor, but after a while when people learned what to do with them became expensive. What’s something poor people eat now that you think will have a similar trajectory?

Edit: y’all stop listing things that are already getting expensive 😭

(Definitely not just trying to find something good that’s cheap 😗)