Mostly because of Instruction Level Parallelism. While the number of cycles per second has not increased since 2015, the number of instructions per cycle has mo

Mostly because of Instruction Level Parallelism. While the number of cycles per second has not increased since 2015, the number of instructions per cycle has more than doubled due to more efficient architectures and duplicated circuits. So a core from 2015 could perhaps run 1.5 instructions per cycle, but one from 2022 could run 8 instructions per cycle and thus would be more than four times faster (at least on some tasks). You can not tell when you need to replace your old processor with a new one without manually comparing them. Performance is much too workload specific these days.