A lot of Charleston white people never really had a super heavy drawl like that. white Folks who got long lineage in those older low country cities (Chuck,SAV, Wilmington, Brunswick) actually sound closer to what wealthy white folks in England sounded like 300 years ago than folks who live in England now. That’s why you see so many actors from UK or Australia playing old time period southern roles in movies and TV. Back then white folks from the low country usually had money, wasn’t no room for po hustling, sugar, rice and indigo was the only thing smoking. And that shyt was like oil sheik bread today. It was crazy. So they had any land that could turn a check on lock. So the poor folks, who usually was Scots Irish, had to move into the interior, 100-200 miles deep. And that’s where what you would call a southern drawl comes from, the folks who was basically frontiersmen, not wealthy slave owners. You can’t grow shyt in the red clay you start to find once you cross the sand hills and the fall lines, so them folks was poor white trash status early. Those are the ancestors of the rednecks and hillbillies. Not the low country white people. Most coastal white people are different, they usually got money, they usually from fam that goes back a long way in the area, and sometimes they damn near aristocratic actually. The south had the most loyalists to the crown during the Revolution, and they never really let go of that old English shyt. They don’t fit the uneducated trailer park stereotype. They just as conservative and racist, but they harder to spot, cuz they’ve been exposed to stuff and know how not to move. Even now, if you in the A and meet a white person from St Simons or Jekyll, they probably got long money.