Can't believe I read all 10 pages!
The BIG thing that has not been mentioned, but shines through from lots of replies is that it would be a lot more work for you, OP, if you took this on, started shopping around, started cooking ftom scratch...
Yes it is expensive, but you are buying TIME.
I went from Waitrose to Lidl when we lost 3/4 of our income 2 years ago.
We still eat just as well, maybe better. But I do a heck of a lot of vegetable peeling and chopping, chicken deboning, breading my own chicken nuggets, making stews, soups, everything from scratch. Then washing up pans chopping boards bowls etc. Home made lasagne is lkvely but a lot of effort.
I spend a lot less, eat lots of nice food, but it takes a heck of a lot of time compared to buying salad bags and ready meals.
I don't even get to feel smug. Just feel a mug sometimes, as all this hard work falls to me!
So it is a choice. And the real question is: can you afford it? If yes, then why change?