Roughly 15% IPC improvement in the past 4 years. Once you take away the clock speed and node advantage, along with Floating Point performance due to additional

Roughly 15% IPC improvement in the past 4 years. Once you take away the clock speed and node advantage, along with Floating Point performance due to additional instruction set ( IIRC Apple still dont support SVE ) and Matrix Maths, both substantially increase benchmarks on certain GB6 test. You are looking at sub 10% IPC improvement over past 4 years give or take. You can have a design that maximizes IPC but can't clock high. You can have a design that clocks very high but has low IPC. They both matter. It's tradeoffs. It's fine to isolate IPC from gen to gen, but ultimately meaningless since overall performance and performance/watt is what matters. Furthermore, Apple's IPC was and still is miles ahead of AMD and Intel so the starting base is high. Improvement to IPC should be expected to be slow. Apple is finding other ways to improve performance.