I don’t think dotting nuclear reactors around everywhere would be politically very acceptable. Each plant will also require some level of staffing, operational and security staff. Seems more likely that small modular reactors would just be deployed in large batches to lower the fixed costs, and accept the transmission losses.

The electricity grid does not have a last mile problem for supply. And just putting them anywhere will just raise costs. Better to put multiple units next to an existing substation on the backbone. Then those units can supply electricity to potentially millions, not just the city at the end of the last mile.