Right, they are unrelated.
FWIW,
-preview=rvaluerefparam is just kinda... sitting there. And probably because I stopped aggressively pushing for progress. I used it plenty and it's fine, but I can't release libs or whatever that uses it while it's just a preview.
The question about 1040 though, isn't that DIP already like 3-4 years old? It had community reviews, why is it stalled too? It's something D really needs to not continue to die a slow death... which I fear has become inevitable on the basis of progress failure.