Like stratocumulus, altocumulus is an unassuming cloud. It’s only there because there happens to be enough water vapor in the air to condense out into water droplets. As the temperature drops with altitude, it eventually reaches the dew point and clouds form. Altocumulus has a lumpy appearance because of mild convectivity, but it has minimal vertical development. There’s no drama, other than the visual drama that can come with the right lighting. There’s no threat of exciting weather and precipitation is rare. Altocumulus are just clouds.