[DyslexicAtheist]

is anyone using these systems in production? I would immediately apply to work in such a place.

It's a catch-22. The biggest gain in using NixOS/Guix are production systems big enough where it matters. And every place that grows big enough where this would be good for the them they usually roll their own ... Because tech-debt doesn't allow them from switching to another OS + they have so much duct-tape that if they'd replace it, would also have to find work for those doing the duct-taping. I think it's not a technical problem at all, nor do I think it's because we lack ideas.

[spindle]

Yes, there are places that are using NixOS in production. I don't know the details, so this is a placeholder for someone else to fill in - or else ask on the NixOS subreddit or IRC channel.