If you were a machine learning researcher or data scientist ten years ago, you might have spent a lot of time implementing individual algorithms like decision trees and neural networks by hand. If you were doing that work five years ago, the algorithms were probably already implemented in popular open-source libraries like scikit-learn, but you still might have spent a lot of time trying different algorithms and tuning hyperparameters to improve performance. If you're doing that work today, scikit-learn and similar libraries don't just have the algorithms nicely implemented--they have tools to help with experimentation and hyperparameter tuning too. Automated machine learning is here, and it's pretty cool.
Relevant links: