> significant memory bandwidth and latency advantage

This is to cache or the main memory?

I remember x86 based PCs taking 100ns for RAM access. Is it faster in ARM?

> They use the same memory for the CPU and GPU, so the memory interface was optimized more like a GPU and the CPU benefits in a few memory-constrained benchmarks (machine learning, AES-XT streaming)

This would mean each core having some dedicated RAM section better connected. Wouldn't this be more like L3 section in x86 but bigger? Maybe this is the advantage of having everything on the same die.

Beyond a certain size gains should also flat out, no?