The way the economy is, that often doesn't last. Then you have one person with a good job, and you better hope you saved. But you can easily eat up all of that previous income with things like urban housing which can be very expensive, an extra car, or a child's college tuition.
So anyway suggesting this situation occurring at some point for someone today is 'affluence' is not very realistic.
Maybe a few decades ago with less inflation those numbers would indicate 'affluence'.