Install Sublime Text 3 on Linux via POSIX shell script - http://simonewebdesign.it/install-sublime-text-3-on-linux/

install_sublime_text.sh

#!/bin/sh

# Sublime Text 3 Install (last update: Monday 13 March 2017)
#
# No need to download this script, just run it on your terminal:
#
#     curl -L git.io/sublimetext | sh


# Detect the architecture
if [[ "$(uname -m)" = "x86_64" ]]; then
  ARCHITECTURE="x64"
else
  ARCHITECTURE="x32"
fi


# Fetch the latest build version number (thanks daveol)
BUILD=$(echo $(curl http://www.sublimetext.com/3) | sed -rn "s#.*The latest build is ([0-9]+)..*#\1#p")

URL="https://download.sublimetext.com/sublime_text_3_build_{$BUILD}_{$ARCHITECTURE}.tar.bz2"
INSTALLATION_DIR="/opt/sublime_text"


# Download the tarball, unpack and install
curl -o $HOME/st3.tar.bz2 $URL
if tar -xf $HOME/st3.tar.bz2 --directory=$HOME; then
  sudo mv $HOME/sublime_text_3 $INSTALLATION_DIR
  sudo ln -s $INSTALLATION_DIR/sublime_text /usr/local/bin/subl
fi
rm $HOME/st3.tar.bz2


# Add to applications list and set icon
sed 's/Icon=sublime-text/Icon=\/opt\/sublime_text\/Icon\/128x128\/sublime-text.png/g' > $HOME/.local/share/applications/sublime_text.desktop

echo '
Sublime Text 3 installed successfully!
Run with: subl
'

Sublime Text appears to have an official repo for installing on Fedora now. Does this still need to exist? It has served me well, but at this point I just want migration/removal instructions so that I can safely switch to the official repo.

Nice, finally, thanks for pointing that out.

For the migration, unless you have fancy stuff, all you need to do is save your user configuration somewhere (e.g. one convention is to have a dotfiles repository, but you might as well just make a gist or keep it somewhere else), also keep note of your plugins and themes. When you're ready just do rm -rf $(which subl).