In the 60's the supermarket chains took over the high streets and the high streets all ended up looking the same. Now at least some of the supermarkets are selling a variety of local produce.

Yes, but that's mostly spin. In Scotland, when a UK-wide chain says they sell a large proportion of Scottish products, the main producer is Barr's and the best-selling product is Irn Bru. They aren't helping small farmers and artisanal producers at all.

And there are quite a few booked performers on the circuit who are music's equivalent of Irn Bru.