Strange metal behavior – best known as a linear-in-temperature electrical resistivity out of which unconventional superconductivity nucleates – is ubiquitous in many classes of strongly correlated electron systems [1], and has recently also been observed in new flat band platforms. A unified understanding is in high demand. The heavy fermion compound YbRh2Si2 is a particularly versatile model system for studying this physics. I will present its salient features, including the dynamical scaling of the optical conductivity [2], its superconductivity at ultralow temperatures [3], and its strongly suppressed shot noise [4]. I will also discuss evidence for (some of) these features in other materials classes, the topic of Planckian scattering [5], and how insights gained from all these experimental results may boost the theoretical understanding.