I really appreciate understanding the reasoning, definitely. I imagine something similar might have played out with Lumen mirror translucency, but I just wouldn’t know. That being said, translucency is already way complicated in Unreal, and no rendering method short of full path tracing seems to get it exactly right, so I’m certainly not surprised it needs work.
Kind of related, but they got lumen reflections working on SLW and it is amazing. It even works on the Niagara fluids, although why the ray-tracing cost doesn’t explode with that massive particle count is beyond me.