I have enjoyed writing HTML/CSS/JS (vanilla) apps on my personal projects and use React for large apps at work. When my apps get large, it gets harder to manage

I have enjoyed writing HTML/CSS/JS (vanilla) apps on my personal projects and use React for large apps at work. When my apps get large, it gets harder to manage, whereas when using React, each component is contained, so I don't have to worry so much about what's going on around it. That's not a good description, but it's easier to built on top of a large React project, than it is on a large vanilla project. Frameworks also establish a common way of doing things like tracking state. For example, in vanilla projects, one developer might implement it in a unique way that no one else understands. You want to work with code that works well with multiple developers on larger projects. It's still fun and interesting using vanilla for personal projects. I built a bunch of apps with just a CSS framework and JS was vanilla. (my apps: https://lewdev.github.io https://lewdev.github.io)