You could argue that the sale of Atlantic National, Florida National and Barnett Banks didn't hurt downtown because the banks that gobbled them up retained a presence there - and still do. But I don't think you can say the same for the sales of Gulf Life, Independent Life, Peninsular Life, American Heritage, and probably others I've forgotten. True it is that downtown isn't what it once was, but that doesn't mean that we're not a huge metropolitan area. We are. It's just that we' spread out to what once were suburbs. In the 50s even something as close in as Southoint didn't exist. Orange Park and Middleburg were really small bedroom communities - not considered a part of Jacksonville. Mandarin was only sparsely developed, and almost all was west of State Road 13 which was a two-lane road all the way from what is now the Southbank. And the Southbank was the home of only Baptist Hospital - not yet a medical center - and the original Prudential Building. Not much else was there.
Why did Orlando pass Jacksonville? C'mon. In a word, Disney World. Tampa? A bigger, better port, accessible without navigating tricky currents of a river for a few miles, and a few hundred miles closer to the Panama Canal than we are.
Speaking of Independent Life and Peninsular Life, why is it that after jilting Jacksonville we still have streets named after them. I'd change those in a NY minute if I got to make the rules.