A loyal Pennsylvania as Britain's North American buffer

How would the American Revolution change if Pennsylvania remained loyal to the British Empire?

Its geography could split the emerging United States, strengthen British North America, and possibly leave New England aligned with Canada.

Pennsylvania's position between New England and the southern states matters more than its survival as an isolated loyal colony. A British-aligned buffer could separate the northern and southern rebels. New England might then remain attached to British North America while a separate southern grouping develops below Pennsylvania, with recurrent conflict along the new borders.