I think sometimes the nostalgia for times with no money, is part of trying to reduce the heart ache
My mil always talks fondly about counting out their money on the table for weekly budgeting etc and how life was much simpler etc
My DW has lots of memories of DMIL crying doing it.
There's a particular family story of how they had a right laugh about misbudgeting a summer holiday and how they all laughed and had the best holiday ever. That's definitely not DWs memory of it.
Interestingly DMIL recently found a diary she kept about a certain stage of her life and said that she was surprised at how stressed and sad she was in it
I do think our brains try to buff out the memories into something kinder