There's plenty of families now where both partners getting common free days is a rarity, let alone organising group meets. You don't need a day for grocery shopping - just an hour or so. It's not like we found it difficult, or the public agitated for it before Sunday was added to supermarkets and Primark. It was just a concerted trade push for more commerce. :)
But when your refusal puts you at a disadvantage compared to your competition, it eventually stops being a viable choice.
Even the isle of Harris, which still maintains Sunday closing and the slow island pace of life, is changing away from it.
The Islands, and some parts of Wales, maybe other regions had a much more restrictive approach to Sundays than our old "fun permitted" rules, as a religious thing. They'd have more like a total shutdown, with dry Sundays and restriction of entertainments and travel. That may have changed, but they might still be far behind even our old Sunday trading rules!
And I was kind of annoyed when I realized how Sunday works here but came to realize other people want their Sundays free and quiet just as I do. Most people who really need to buy whatever on a Sunday would be screaming the loudest if asked to work Sundays.
Or you can stop at a store on your way back from work...
I left the church but really miss that aspect of it.
There was a distinct change of pace and feel, far, far less traffic on the roads, and a day free of annoying commerce everywhere. The whole world seemed quieter and lazier on Sunday, and thanks to the huge reduction of traffic, smelt nicer. It was the obvious day for the BBQ, day trip to the beach or theatre, the event in the local park, meet with friends etc.
I miss it.