what are some areas that vote for the same party as they did decades ago

[DINGO Joe]

Many coal counties in EKY and WV were loyal R until the depression and union wars.  Harlan was extremely R until it's Bloody Harlan days and McDowell even voted for Hoover in 1932. Of course, the coal counties had huge inflow of people and then outflow as they boom-bust.  Meanwhile, a Jackson Co Ky just has generations of the same people with no boom or bust.

[DINGO Joe]

Most majority-black deep south counties work, obvs.

Seattle and some parts of rural New England have gone from industrial to hipsterish.

I think Yadkin County NC works--it's gone from a sort of unionist GOP tradition to a more exurban type culture.

Even though Yadkin is part of the Winston-Salem MSA, it doesn't act like a suburb demographically.  It's rather poor, old and extremely low level of education.