Because we’re all getting `dumber in the age of Google`
What's wrong with that ? I fail to understand ? If you start putting everything into your brain, you'll soon go mad. A regular cleanup of the information in your brain to retain only what's relevant for your survival is okay. It's best such things are left googleable. What is the use of keeping in memory the capital of australia, when that trivia contributes a total `0` to do what you do.
If you keep doing, implementing and executing stuff that you are passionate about, I think you'll keep learning. Only thing is that we become more focussed as adults about our interests, than we are as children (inquisitive about everything).