The current project is using react components written in class form, which is already outdated and it is no longer advisable to write components this way. You can see more about it  in this link.
Changing components written in class to function format is a very important update to bring scalability, best practices and simpler refactoring to the project.
So that future people in the community who want to contribute, but don't know this old format of creating react components, can also add to react-stickynode.
Surely this is an important change for the future of the project in all aspects.