Why were ferrite core memories replaced by semiconductor memory?

Magnetic core memory, which utilized tiny ferrite cores to store data, served as the primary form of main memory from the 1950s until it was supplanted by semiconductor memory in the 1960s and 1970s.123

The transition to semiconductor memory was driven by significant advancements in integrated circuit technology, which offered superior performance and cost-effectiveness. While early core memory had cycle times of approximately 17 microseconds, the first semiconductor-based dynamic RAM (DRAM) chips achieved cycle times of about 500 nanoseconds, providing much faster data access.43

Furthermore, semiconductor technology enabled an extraordinary, long-term reduction in the cost per bit of memory. This dramatic decline in cost, combined with the ability to pack more data into smaller physical spaces, made semiconductor memory more efficient and scalable than the mechanical and manual assembly processes required for ferrite core grids.43