[TheOtherHobbes]

The North of England has some good examples of the opposite. The Leeds/Bradford/Halifax/Huddersfield area is - was - gentrifying rapidly with an obvious shift away from the ruins of heavy industry to art/craft projects and enterprises of all sizes. The Calder Valley is almost notorious for it. There's also Salts Mill near Shipley, which is a carefully authenticised artisanal mall in an old converted mill.

And you'll find plenty of web/creative agencies plying their trade in the area, although that sector isn't quite as distinctive as in - say - Manchester.

It's all part of the standard gentrification cycle: - collapse -> bohemian -> artisanal -> gentrified -> investment grade -> collapse... but hurried along some.