tl;dr:Derek had too many pets, and each time he adopted one, he was "enamored with the potential." Over time, he realized that having many pets hurt them so he started to let them go - his pet project to start a business, plan to travel everywhere, dream to learn Chinese, etc... and slowly it allowed him to enjoy the freedom and feel less conflicted.
tl;dr:"If you are a web or API developer, programming code that uses an SQL database, this is for you. I’ve found a very different and useful way to structure code."
tl;dr:The world conditions us to add - more priorities, tasks, things to do. It's a mindset that benefits others but yet we still do it. Successful people subtract.