What a long, strange trip it's been. Ten years ago, most computer chassis were plain beige enclosures, barely worth mentioning. But over the years, manufacturers have been adding features: better materials, more fans, toolless drive bays, side windows, cable-routing cutouts, airflow ducts. And where they've faltered, modders have picked up the pace. Today's sub-$100 cases have features that weren't seen on the fanciest cases five years ago, and thing are only looking up.