Any more complex code was left to the compiler. The removal of so much circuitry, about  of the transistors in the Motorola 68000 for instance, allowed the CPU to include more registers, which had a direct impact on performance.
The intricacies of the code were delegated to the compiler, enabling a substantial reduction in circuitry, notably around half of the transistors found in the Motorola 68000 CPU. This led to an increase in register capacity, which had a direct and significant effect on performance enhancement.