OK USA has screwed it's food chain, but that does not apply outside. People generally value traditions, and specifically food traditions, highly. It's a long way from financially difficult to keep these alive. People just have to decide they want to and spend time, not money. People round here do that.
N.B. Traditional food does not come from a shop, you make it yourself. Thus, it cannot be gentrified away. Growing your own local specialities is usually easy where it is traditional.
If you can't imagine obtaining anything without going to the free market and haggling, your limited options are your own doing. That's not gentrification.