Way, way back, a couple of centuries ago, oysters were food for the poor. I remember reading that years ago and marvelling at it - as I still do when I see the exorbitant price of those delicious shellfish. However my forefathers and foremothers would look in astonishment at how our expectations have changed.
Take fish. When I was a little girl we had cod and chips (home cooked!) every week but fresh salmon was a very rare luxury and indeed few of my friends had ever tasted it. These days salmon is considerably cheaper than cod.
A car was a rare possession for families sixty years ago and most of my friends would travel by train when they went on holiday. These days rail travel is very rare and few families have no access to a car (although I suspect that might be different in areas where there is still a proper public transport system).
One of my most frequent errands as a child was to post letters for my Mother. Although my Father's job meant that we had a telephone at home, few of our relations had such a convenience, so Mother would write regularly to her brothers and sister and to my grandparents. Every day letters popped on to the mat and so news was shared.
But today when my own letterbox rattled I found I had received one of those great twenty first century luxuries, a handwritten letter, this time all the way from the USA. And so I prepared another luxury, real coffee (more or less unheard of in my youth) which I will drink from my beautiful china (Grandma very rarely used the best stuff), and read a handwritten letter from a land which seemed as far away as the moon when my Father went there on business when I was just five.