Quick! Name a little-known industry that has blossomed over the past 20 years.
No, you can't say the internet. That's not little-known.
Here's my entry: the Social Security benefit-claiming industry.
Yup, it's a real industry in which thousands of financial planners offer an intricate service. They help us pick the best, most profitable time to start taking Social Security benefits. An army of software developers provides support.