I concur on the pebble bed stuff... GE and Westinghouse always making things more complicated than they need to be in order to bill support.

But the promise of modular is orthogonal to whether the fuel is solid or liquid. Being able to assemble a plant out of shipping container sized parts that are built in a factory is a game changer for construction cost... Also for replacement or decommissioning, you don't need the army corps of engineers to move the things...