At least on Mac, Reality requires a very very specific build environment, owing to the mind boggling nastiness that is QT. I used to have a VM of that environment, but it was lost on server raid failure. Every attempt to rebuild that environment that would produce a working compile, failed. I gave up on it since LuxRender sort of fell apart, came back together, but with the Mac version being the red-headed stepchild (to be fair, Apple's fault) It was way too much work just to get working, let alone maintaining it with too many major component libraries needing to be "just so" for it to work at all. Worse than a moving target. One working compile a few years ago, and I gave up.

As much as I loved it, once Poser went Cycles (with its own issues) it was a lost cause. If I need Reality, I fire up Poser 11. And marvel at the ease of photorealistic renders. There were some good ideas there; it might be nice if Poser had a better plug-in architecture for modelers (blender) and renderers (cycles, radeon pro). I'm sure the Dev team has nothing but free time to pursue such things.

As for Reality, I would much rather it be able to export a scene for Radeon Pro Render rather than Lux, anyway. And I know Reality is coded such that this is possible (it's essentially agnostic). But QT.... makes me cry just thinking about it.