How many different ways are there to customize XF?

I want to use XF as much as possible, but, of course, not everything has been implemented yet in the built-in feature set. Therefore, it would be nice to see a list of all the different ways XF can be customized and the different use cases to use each. Does such a list exist? Are the following our only options:

1. Custom View renderer
2. Custom Page renderer
3. DependencyService
4. MessagingCenter