Read their first two paragraphs again. They're talking about individual services (and so am I). Steeringwheel-svc, Rackandpinion-svc, Shifter-svc, Engine-svc, Transmission-svc, Axle-svc, Tire-svc. Same as filetransfer-frontend-svc, filetransfer-batchloader-svc, filetransfer-batchtransform-svc, filetransfer-db, etc. (those names might still be too generic, but at least you know what I've just described)
To use your car analogy: It's the Ford Mustang, not the Ford goes-really-fast-as-long-as-you're-not-taking-any-corners-sporty-car