And yet dicebot continues to work in D, including for me for a while.
I'm hiring 25 D programmers, so I suppose it very much depends on what you mean by practically!
What company is it?
I have watched the ocaml community go through a renaissance when for a while it looked like it was moribund, and the D community looks like it is developing the same undercurrent of momentum. given that D is a great language and the implementation looks solid, I don't think it is in danger of dying.
Ocaml always enjoined institutional support such as from Inria.
I really like a lot of the ideas in D, but I feel like the language suffered from having too many ideas/features.