The scientific community's collective existential crisis over color map choices in data visualization. Four perfectly reasonable gradient options (viridis, plasma, inferno, magma) elicit mild confusion, but "cividis" — that slight blue-yellow abomination — triggers pure scientific rage. Nothing exposes a researcher's primal instincts like a poorly chosen color gradient that makes your retinas file for divorce. The matplotlib developers knew exactly what they were doing when they created this crime against visual cortices everywhere.