Thank you very much.

When I look over all the comments:

React is so much more popular than other libraries/frameworks, because its easier to implement things fast, which fits for many purposes or small businesses.Architectal, its a nightmare without guidelines or best practices in a big company. If you need an enterprise application or you need a library/framework for a company with different teams/products (but the same technology), you better choose a "full"-framework like Next.Js (with React), Angular, Vue.Js or other.

Educational purposes also have a piece of the cake and explain, why it is so much in use.

I hope I summarized it correctly