This study proves what many have intuitively predicted. As AI software becomes more advanced, and it's continuously promoted as a tool to make life more efficient, humans will eventually turn off their brains by choice. Similar to the movie WALL-E, humanity is headed toward a world where people can essentially no longer read, write, speak, or think for themselves.
While AI may seem like an exponentially different kind of technological advancement, humans will likely deal with it the same way they did in the past. Previous breakthrough inventions, most notably the Google search engine, were met with the same warnings, but in the end, Google Search didn't make people dumber. The same will come of AI, especially as society learns to master it like it did every other invention.