99% of Developers Don't Get Virtual Memory

Virtual memory helps computers use more memory than physically available by combining RAM and disk storage, enabling larger programs and multiple applications to run simultaneously. Address space abstraction, paging, and page tables are core concepts, with mechanisms like demand paging and page replacement to manage memory. While beneficial for multitasking and memory isolation, virtual memory can cause slowdowns due to paging and swapping, and excessive use can wear out SSDs.