I'm a Tremont resident and have been for 63 years. When I was a kid, there was quite a lot of retail here. If you added in the department stores on 25th around Lorain and the rest of the retail on 25th from Detroit to Clark, my family rarely ever had to leave the neighborhood to buy anything--everything we needed was within a 20 minute walk. I remember regularly walking with my grandma to the west side market down 14th and across that rickety bridge over the train tracks. It used to scare me to death to look down the huge holes in the sidewalk to see all the tracks below me as a four-year old. Some of those holes were almost big enough for me to fall right through.
But here in Tremont proper, I remember there being a hardware store, a bookstore, a Catholic religious goods store, 2 drugstores (one of 14th and one on Literary), two flower shops, a grocery store on 14th, three auto repair shops, a donut shop on 14th where Terrapins is now that only sold glazed donuts (13 for $1.00), a bakery by Pilgrim church and a Lawsons over there, too; a ladies dress shop on Professor, several candy/comic book/pop stores that catered to kids only...and either a bar or a family-run convenience store on practically every neighborhood block. I'm probably forgetting a few things, but you get the idea.
All the small stores began going out of business when the Kmarts and Gold Circles and other big box stores moved into town. Who can compete with those guys? But I do miss my old Tremont very much. This neighborhood is nothing like it once was, and never will be that again. Everything back then revolved around family, tons of kids, church, and immigrant culture. Every kid I knew had parents from "somewhere else" (either Eastern Europe, Puerto Rico, or West Virginia) who spoke another language, spoke English with an accent, and cooked incredible food.