Fresh fish, meat and deli here at Waitrose, fish and meat usually cut as requested. At least that isn't pre-packed only. Seems that the big three have done away with service counters with little complaint from their customers. It's true that the large continental supermarkets haven't descended to what seems like an American practice. I've never been in one but I would expect Booths to have retained their service counters. I think that Wholefoods is the only US chain that has any respect for its customers' wishes there.
Having wandered parts of Europe I am inclined to agree the UK is more akin to US practice regarding fresh food. I agree it is down to time and inclination. It is a bit like people say they do not have time to walk somewhere so drive instead BUT they do have to make time to go to the gym. In practice I suspect they set up the gym membership plus direct debit then never go or never have time to cancel the direct debit.
For people who appreciate fresh food then they can spend out on a restaurant meal. Not that all restaurants are the same - there is a (theoretical) difference between a cheap restaurant and an expensive restaurant.
Looking at what people have in their trolley at my local Morrisons.
There are those with ingredients - fresh or pre packed.
There are those with ready made meals. cakes/sweets and booze not too rarely.
I am a mixture of the two - I describe myself as ex batchelor able to fly a microwave but cooking proper meals to eat over Friday to Monday. Meanwhile my missus who drives my out of the kitchen is a COOK.
I wonder if since Covid19 more home working has affected what (how much) people buy in supermarkets. Quite likely more eating from home means more from the supermarket. Correspondingly less eating in a staff canteen or other eatery in the area of employment even sandwiches. The decline of meal outlets in working areas indicates more sales of food likely in residential areas - that is supermarkets for ingredients and possibly restaurants/cafes but more likely meal deliveries rather than restaurants/cafes.
So will supermarkets suffer a change as the post Covid19 working from home culture evolves (gets watered down) ?.