Where to begin a review of William DeVaughn’s 1974 ghetto yacht classic “Be Thankful for What You Got (Pt. 1& Pt. 2),” which isn’t just the coolest song ever written about an inner-city ride of choice (cooler even than War’s “Low Rider”) but could be the best song ever written about a car, period? The DC sewer system? The Miracle at Sigma Sound Studio? DeVaughn’s melt-in-your-mouth Curtis Mayfield-school vocal stylings? The smooth groove that never, ever, lets up?