For applications like local AI and the majority of PC video games, you are not expected to have DDR5-level GPU bandwidth. It is a constraint, there is no "good enough" when you're selling a desktop-grade M5 Max that is bandwidth-constrained in practice. Modern gaming at native resolution is pretty much impossible on most Macbook Pros.

It's an acceptable approach for iPad-level stuff, but for professional workstations and desktops it's not competitive.