The "new failure cases" it adds are rather exciting -- if the MCU locks up or glitches, which they are prone to, then it could short the supply rails and blow the switching transistors, or destroy the connected load by overvoltage. Analog control ICs, while they are not 100% reliable either, have many safeguards built-in that can react nearly instantaneously and don't depend on the relatively complex process of executing machine instructions.