What is the main achievement of using virtual memory? And Explain at least three advantages of a virtual memory and how it has affected our modern society. It can be observed that virtual memory has...

What is the main achievement of using virtual memory? And Explain at least three advantages of a virtual memory and how it has affected our modern
society. It can be observed that virtual memory has several disadvantages. Can you explain why people are still using virtual memory regardless of those disadvantages?