False. CMOS gates (4000-series) consume no power except when they switch. And they work at low voltage. There are ways to make a microcontroller use less power

False. CMOS gates (4000-series) consume no power except when they switch. And they work at low voltage. There are ways to make a microcontroller use less power, by making it hard-sleep when nothing is happening, but you don't get that without extra work.