As someone who has tried both, I found the learning curve for Guix much more pleasant than for Nix. With Nix, the community is for sure a lot larger, and more things are available (notably it is a lot faster, too). But I could never get everything clear in my head, how it hangs together, and the community seemed very much more fragmented than with Guix. I think the Guix documentation and manual, as well as the CLI and secondary docs written in people's blogs, were much easier to get a handle on than with Nix. Flakes are a great example, I still have no idea what a flake is, they are still an experimental feature, and I have no idea how I should think about them. I've been using NixOS full time for 3 years by the way.
I also think the shepherd alone is almost a killer app relative to something like systemd. I had to write a service myself for restarting ssh tunnels, and I could even do "advanced" things like templated configuration, almost trivially. It felt like a superpower, relative to systemd services.
> Flakes are a great example, I still have no idea what a flake is
A package that fully specifies its dependencies (via flake.nix/flake.lock) instead of depending on whatever the user has in their Nix channels. You enable them via:
nix.settings.experimental-features = [ "nix-command" "flakes" ];
The fun part with flakes is that they turn git repositories into full packages, meaning you can do stuff like:
nix run github:user/project?ref=v0.2.0rc1
That flakes are still marked as experimental is annoying, but they have been working fine for well over three years.
With RDF specially, there was also the issue of "WTF is this good for?". Semantic Web sounds lofty in theory, but was there ever even a clear plan on how the UI would look like? How would I explore all that semantic data if it ever came into existence? How would it deal with link rot?
And much like with RSS, I think a big failure of RDF is that it's some weird thing outside the Web, instead of just some addition HTML tags to enrich existing documents. If there is a failure, it's that. Even today, a lot of basic semantic tags are missing from HTML, we finally got <date> in 2011, but we still have nothing for names, cities, units, books[1], movie, gps coordinates and a lot of other stuff we use daily.
Another big failure is that HTML has become a read-only format, the idea that one uses HTML as a source format to publish documents seems to have been completely abandoned. HTML is just a UI language for Web apps nowadays, Markdown, LaTeX or whatever is what one uses to write content.
0. https://en.wikipedia.org/wiki/Cyc
1. <a href="urn:isbn:..."> exists, but browsers don't support it natively