Diminishing benefits of RISC

Over time, improvements in chip fabrication techniques have improved performance exponentially, according to Moore's law, whereas architectural improvements have been comparatively small. Modern CISC implementations have adopted many of the performance improvements introduced by RISC, such as single-clock instructions. Compilers have also become more sophisticated, and are better able to exploit complex instructions on CISC architectures. The RISC-CISC distinction has blurred significantly in practice.