Popular where? On HN, because it's functional, and people around here like functional, just as they like Emacs, for instance. It's not popular in the industry, as far as I can see (also, just like Emacs).
For the record, I like Nix (and also Emacs), but I would never introduce it in my team. The learning curve is very steep, and the problems that it solves are mostly handled "good enough" by Docker, which I actually dislike, but everyone and their dog know Docker, there's pretty much zero training for new hires needed, introducing Nix simply does not make any business sense. In a small startup team of like-minded functional programming people, sure, but in a large org? I just don't see it.
It's funny how "not popular in industry" is always overstated. I can't deny it has very small marketshare. And yet, I've had 4 jobs in the last 6 years that have all used Nix. None of them "small startups" either. So you don't need to be popular to have enough for people to get paid to use it. Haskell is the same way.
Also, I ignore people openly who try to evaluate "business sense" as if technology decisions can be quantified like that. The biggest benefit of these Nix and Haskell shops is it attracts enthusiasts who in turn train and excite other hires. Which is turn adds more Nix and Haskell lifers to the world. One "bad business decision" at a time. That's my MO at least :)
Popular where? On HN, because it's functional, and people around here like functional, just as they like Emacs, for instance. It's not popular in the industry, as far as I can see (also, just like Emacs). For the record, I like Nix (and also Emacs), but I would never introduce it in my team. The learning curve is very steep, and the problems that it solves are mostly handled "good enough" by Docker, which I actually dislike, but everyone and their dog know Docker, there's pretty much zero training for new hires needed, introducing Nix simply does not make any business sense. In a small startup team of like-minded functional programming people, sure, but in a large org? I just don't see it.