You don’t really need realtime raytracing, a big advantage is that minecraft is cube based, and the blocks cannot move, that means you can generate the lighting once, and it would have almost 0 performance cost, which still utilizes a bit of raytracing, although differently, only time you need to regenerate it is if the sun is moving, in which case you can still recycle sky exposure and possibly light bounces, and only update it every 2 seconds instead of every frame

No, the lighting currently is super simple and performant, and it shouldn’t cause big performance issues, not an more than RTX, since it is already quite easy and can use the optimization I’ve described