The more cache you have, the harder it is to get it to the frequency you desire. A larger cache also means a more power hungry cpu producing more heat and subje

The more cache you have, the harder it is to get it to the frequency you desire. A larger cache also means a more power hungry cpu producing more heat and subject to significant reliance on Moore's Law in order to avoid stalling out on cache size and being forced to go back to RAM. Also, its a lot easier to scale outside of a chip with external, or on-package, DRAM which allows for modularity within the the same cpu segment.