Awesome and great explanation for a layperson. Because the industry has been faking lighting for so long and lighting is quite important, the industry has become incredibly good at it. But it also takes a lot of development time that could be spent on adding more content or features. There's a reason the opinion about ray tracing is extremely positive within the game development industry. But also nobody's expecting it to become the norm over night, and the period with hybrid support for both raytracing and legacy lighting is only just starting.