Given that both RAM and cache memory are based on transistors, why do we need cache memory if RAM is already volatile? Is it conceivable for all computer programmes to share memory?

Is it possible to define locality of reference and demonstrate that it improves memory access?

If RAM (Random Access Memory) and cache memory are both transistor-based, then why do we need cache memory? Is it feasible to use a single kind of computer memory for all applications?

Why is it necessary for us to have cache memory when we already have RAM (Random Access Memory), which is a kind of memory that is believed to be volatile?Random access memory, also known as cache memory, and random access memory (RAM) are both types of memory that utilise an electrical component called a transistor. Is it really conceivable to employ just one kind of memory to carry out all of a computer's operations, and if so, is it even possible?