I agree swores. Your comment did say 'traditional' and my comment was facetious. There's been an historical transition from small chains owned by individuals (

I agree swores. Your comment did say 'traditional' and my comment was facetious. There's been an historical transition from small chains owned by individuals (e.g. the Victorian Mr John Sainsbury) to big brands (e.g. Superdrug), hasn't there. The possessive apostrophe was appropriate for the former but surely less so nowadays. I would guess "Sainsbury's" was a rebrand intended to reflect tradition.