@schratze I'd add that collapse isn't necessarily going to be obvious and in some ways is happening now.

Yesterday I didn't find a product on the usual shelf and I thought about supply chains. So wupply chains have gone from hidden wonder to now I think about them.

I found the product in a different place so in the end it wasn't a supply chain issue, but empty shelves of the recent past made it plausible.

Point is, it would be good to list symptoms of collapse so we don't miss the signs.