You prefer:

     (add-after 'install 'remove-examples
       (lambda* (#:key outputs #:allow-other-keys)
         (with-directory-excursion
             (string-append (assoc-ref outputs "out") "/lib")
           (for-each delete-file
                     (list
                      "basic-server"
                      "helloworld"
                      "postcollector")))

over:

postInstall = ''
   rm  $out/lib/basic-server $out/lib/helloworld $out/lib/postcollector
''

?

The two main advantages of Guix are the language

I wouldn’t call that an advantage for the average person. Nix is far nicer to work with. Some Lispers might disagree, but I, for one, can’t exactly see the beauty in trying to turn Scheme into a configuration language with macros and hacks. Also Guix puts Scheme everywhere, things you can do with plain old Bash in Nix, you’ll have to all do in Scheme in Guix, so there is a much steeper learning curve.

The biggest problem with Scheme as config language is that it is sloooooowwwww. Nix is already quite sluggish when it comes to configuration changes, in Guix it’s a lot worse, and it’s unlikely to change anytime soon, given that Scheme allows macros and other hacks that might make it difficult to properly cache or index the package database.

I use bat sometimes, but how do you stop it from wrapping lines?

$ cat ~/.config/bat/config
--wrap=never