The Electoral College is an antiquated and anti-democratic mechanism in presidential races; why would states want to inflict it on their gubernatorial races? It would only serve to unfairly dilute urban voters for rural ones.
Hmmmm.....I think I just answered my own question.
Actually, in South Carolina, the urban counties are for the most part Republican. Of the 13 most populous counties, 11 are solidly Republican right now, 1 Democratic (Richland) and 1 swing (Charleston). Under a EV plan, That's 70 solid Republican EV's, 10 Democratic and 10 swing.
The other 33 counties (80 EV collectively, especially the one's in the rural ones in the black belt, are the Democratic strong areas.
Granted, that is largely die to the fact that save for Richland County (and to a lesser extent Charleston), our most populous counties are dominated by suburbs rather than an urban core.