As the article said, none really. It's more the tools that were created to solve it that are useful. FLT is like the Apollo mission of Mathematics and has been

As the article said, none really. It's more the tools that were created to solve it that are useful. FLT is like the Apollo mission of Mathematics and has been for hundreds of years. A crazy dream of no direct immediate practical value, but the pursuit of which sparks innovation and dreams.