Also, it may not seem like it, but software is almost entirely about people. Everything comes down to the users. You need people to use your software. You need people to want to use your software. Even if your users are other engineers, you still need users. You could build the best piece of software ever made, but it’s nothing without usage.

Things like marketing, product, and design are usually equal parts of building software.

This is something that took me a long time to come to terms with.