In the new season of “Succession” (HBO), the plutocratic Roys and their ever-present courtiers are suddenly obsessed with “the temperature.” After seemingly decades, if not entire lifetimes, of insulation from government interference and the public’s disapproval, the Murdoch-inspired clan and their hunched C-suite attendants have had to become human thermometers overnight, trying their bumbling best to gauge the anger of the masses below from their executive boardrooms in the sky.