The Globe’s Diti Kohl has a good story on Stop & Shop, the still dominant supermarket chain in Massachusetts (barely) that’s struggling to stay competitive with rivals who seem to grasp the importance of appearance and service at stores. … One expert refers to S&S as a “sterile, middle-of-the-road grocery store” while others have noted the service decline in its butcher and seafood departments. S&S is definitely at the bottom of my go-to store options when I’m thinking of buying steaks or seafood.