Repology and outdated packages

[kiasoc5]

Dear Guix,

I've been watching the Repology page for Guix and I've noticed that we've 
dropped to 51% outdated packages [https://repology.org/repository/gnuguix]. We 
used to be at 40% outdated packages a few months ago.

I know that rolling release distros don't have to have the latest packages but 
this is not the best representation of Guix, especially when our friend NixOS 
claims they have the largest and most updated package collection 
[https://nixos.org/blog/announcements.html#nixos-22.05].

So without demanding more maintainer time, for now I just convince myself that:
- key toolchains such as Rust and Go are not always up to date, thus blocking 
the upgrade of several packages
- we package their dependencies separately (eg Rust crates, Go modules), these 
are a significant portion of Guix that cannot be constantly updated easily
- the Guix 1.4 release is coming soon so more time may be spent debugging that 
instead of updating the package archives
- the Guix branching model of staging/core-updates means we could say Guix is 
an LTS rolling release distro, which there aren't that many of

However I hope that faster package reviews can mean we stay updated faster 
without compromising package quality.

WDYT?