Offhand, I can think of the following alternatives to metal miniatures: prepainted plastic D&D minis (plus Star Wars and Dreamblade figs), Fiery Dragon counters, Monster Tiles, wooden Dragonfire tiles and HeroClix (plus the older Mage Knight minis) — and I’m sure I’ve left some out.

Compare all of those ready-to-go, relatively inexpensive options to metal miniatures — which need to be prepped and painted (requiring time and a degree of skill), and generally aren’t cheap — and I have to wonder: How many gaming groups still use metal minis?