Apple has had a lead on using TSMC's latest process. However the lead in iGPU performance and perf/watt is a fair bit larger than you'd expect from the process

Apple has had a lead on using TSMC's latest process. However the lead in iGPU performance and perf/watt is a fair bit larger than you'd expect from the process differences. I'm still puzzled why during a long GPU shortage where supply was short and prices insane that nobody in the x86-64 world managed a > 128 bit wide memory interface to benefit of an iGPU. Apple desktops and laptops have options for 256, 512, and even 1024 bit (on the studio) wide memory systems.