Things are moving fast. The thing we did yesterday can be legacy today. It can be easy to get stuck in the feeling of not being able to catch up. At these moments, it is a good opportunity to take a step back and look at how things have changed. In this talk, we will take a look at code from Theréses past and she will talk about what she has learned. What have new react versions brought with it and what changes have been made to keep current? How can project structure increase complexity and how should components be tested?