insight 
This is a blog series about reactive programming. A solution to programming in an environment with asynchronous data streams.
Why would reactive programming be used?
The advantages of reactive programming are that it avoids stateful programs, uses clean input/output functions over observable streams and allows the programmer to abstract away low-level threading, synchronization, and concurrency issues. Another advantage is that it creates programs with less code, making them easier to read and understand. Since error handling is built in, it makes the code easier especially in asynchronous situations.
When would reactive programming be applicable?
Reactive programming is best used when concurrency and asynchronicity are needed. Reactive programming handles concurrency and asynchronicity really well and makes these complex concepts easy for the developer. Another good usage is when handling streams of data. Then the reactive programming paradigm suits the flow of the program better. The type of data doesn’t matter.