Eliza, We're about the same age I think. I remember days before plastic. Fish and chips wrapped in newspaper tasted so much nicer and you could read the wrapping too.
I've been taking my own bags and baskets shopping ever since Australian supermarkets stopped using paper bags in the 70s. I try to avoid supermakets but I live in an area where I have limited possibilities. I have a collection of light-weight netting bags I use for loose vegetables. I've trained the checkout people not to empty them out, pointng out that they weigh no more than the plastic kind. (I thank them for their concern). Shoppers and staff ask me about them all the time but I'm still the only one using them. Because we have no rubbish collection I unwrap the plastic I can't avoid and put it in the bin outside the store. Not ideal but maybe someone will notice and get my point. The butcher happily uses my containers.
Cheers, Joy