That +82% IPC advantage of A13 Lightning core is important in context of maximal IPC still available for development of future Intel uarchs (in terms of scalar computation).
- Ice Lake (Sunny Cove) decreased Apple's advatage to +54%,
- Willow Cove to +43% (assuming +8% IPC over Sunny Cove)
- Golden Cove somewhere to +19% (assuming +20% IPC over Willow Cove)
- Ocean Cove 2022 might finally reach Apple's IPC.
This unveils Intel's 4 years deficit in development. Everyone knows this is result of Intel's extra long SkyLake period, almost six years they were sitting still (2015 - 2020). Same deficit have also generic ARM Cortex cores (A77 IPC is inbetween KBL and ICL) however bringing bigger IPC jumps every year than x86. This is future serious thread for Intel, especially when being squeezed also from AMD.
However Intel has Jim Keller since 2019 so we can expect some nice surprise in 2023. He can finish what he started in AMD - two CPUs (x86 and ARM) based on one shared high performance RISC core.