Are Sunday dinners a thing of the past?

After just finishing the cauliflower cheese for lunch I would say that roast dinners were a way of stretching the pennies??

So on Sunday I did a huge roast. Son wanted to take a dinner home with him. It was a large chicken - but they aren't as large as I remember they were when I was a kid??
Anyway - I did a huge pan of roast potatoes and parsnips.
The cook time is roughly the same whatever you put in there.
It did dinner yesterday and today. I've only needed to warm it up? Son took his extras home. You don't need a lot of meat with plenty of vegetables.
It has saved lots of time, less cooking and the cost spread over a few days really does make the effort of preparing all the veg worth while?
I think they knew what they were doing 50years ago