Drawing on Romanian examples, this article explores, in a manner which is accessible to both general scholars of the Romance languages and linguists, how the richly documented diachronic and synchronic variation exhibited by Romanian offers a wealth of linguistic data (often of a typologically exotic nature) of interest not just to comparative Romance linguists, but also to general linguists. This perennially fertile and still under-utilized testing ground will be shown to have a central role to play in challenging linguistic orthodoxies and shaping and informing new ideas and perspectives about language change, structure and variation, and should therefore be at the forefront of linguistic research and accessible to the wider linguistic community. At the same time, the discussion will also highlight how a familiarity with current key ideas and assumptions in theoretical linguistics has a significant role to play in understanding the structures and patterns of Romanian.