In this chapter, we learned how to combine two or more Observables to create a new Observable sequence. We will now be able to merge Observables, join Observables, zip Observables, and combine them in a few flavors.

In the next chapter, we are going to introduce Schedulers that will help us create multithreading scenarios easily and improve the performance of our apps. We will also learn how to properly perform long tasks or I/O tasks for the best performance.