So UE5 transitioned from tracing against SDF in software for Lumen to tracing against triangle approximations (bounding boxes) in hardware, right?
I like the fact that Digital Foundry addressed the skeptics who doubted the need for hardware RT to even exist, I guess the skeptics are proven wrong now by the performance and fidelity
Lumen receives from hardware RT, Lumen now runs much faster, doesn't suffer from screen space artifacts, and can do more precise diffuse and indirect lighting. Hardware RT reflections also comes into play to flesh things out in a performant way.