I'd say that emacs would be the main thing missing for me.

nicklaf · on May 27, 2019

As an Emacs user myself, I share your pain.

You will find the following Easter egg in the distribution, though:

  term% man 1 emacs

     EMACS(1)                                                 EMACS(1)

     NAME
          emacs - editor macros

     SYNOPSIS
          emacs [ options ]

     DESCRIPTION
          This page intentionally left blank.

     SOURCE
          MIT

     SEE ALSO
          sam(1), vi(1)

     BUGS
          Yes.

http://man.cat-v.org/plan_9/1/emacs