quit
  ?
  exit
  ?
  end
  ?
  done
  ?
  bye
  ?
  quit!
  ?
  ^X  
  ?
  ^C
  ?
  ^C
  ?
  help
  ?
  ?
  ?
  ^Z
  $ killall ed
  $ vi

    eat flaming death
    ?

https://www.youtube.com/watch?v=AiM5zEEI_Jo

    $ed a_file
    ... (normal usage)
    r /etc/motd
    w /boot/vmlinuz-3.19.0-16-generic (replace with specific kernel)
    !reboot

[Fixed in the great-grandparent.]

... can it cost more than my contribution?

Legend has it that, if you do, you bring on the Singularity immediately.

    source $VIMRUNTIME/mswin.vim
    behave mswin

    $ jobs
    [4]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [5]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [6]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [7]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [8]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [9]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [10]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [11]   Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [12]-  Stopped                 emacsclient -a '' -nw [redacted]  (wd: [redacted])
    [13]+  Stopped                 emacsclient -a '' -nw [redacted]

  /private/tmp/foo.txt locked by jnpatel@mac... (pid 14836): (s, q, p, ?)?

  emacs --daemon

  emacsclient -nw some_file

This has a number of benefits: 1) no locks like you mention, 2) access to all open buffers (even unsaved) from every emacsclient that's currently running (since they're really all just opening buffers in a single instance), 3) blazing startup speed (emacs is already running, you're just connecting to it and splatting a new buffer to the terminal).

If it just exited with Ctrl-C, you'd never get to know about the : magic.

Not to mention Ctrl-C is ambiguous. What to do: Exit and save? Exit without saving? What if it's a new file? And probably others I'm not thinking about right now.

    Python 2.7.9 (default, Mar  1 2015, 12:57:24) 
    [GCC 4.9.2] on linux2
    Type "help", "copyright", "credits" or "license" for  more information.
    >>> quit
    Use quit() or Ctrl-D (i.e. EOF) to exit
    >>>

    :'a,'b!longrunningcommand

    C-<longrunningcommand finishes>c

Or vim inside emacs' terminal emulator.

I've been there, by accident, two or three times.

The first time was really scary, since I did not know vi, yet, and did not know how to exit it or what in the world was going on...

ZZ definitely still works regardless of nocompat though.

ViM is just Vi iMproved. They share most their keybinds but VIM has the whole plugin architecture thing.

This is a big sticking point for a lot of VIM users [1]. If you ever end up on a Unix box that doesn't have VIM, you can always fall back on Vi.

[1]: /users/religious fanatics/

    zck@zck-desktop:~$ vi --version
    VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jan  2 2014 19:39:32)

    $ vi --version
    vi: illegal option -- -
    Usage: vi [- | -s] [-l] [-L] [-R] [-r [file]] [-t tag]
           [-v] [-V] [-w size] [+cmd | -c cmd] file...
    $ pacman -Qi vi
    Name           : vi
    Version        : 1:070224-2
    Description    : The original ex/vi text editor
    Architecture   : x86_64
    URL            : http://ex-vi.sourceforge.net/
    Licenses       : custom:ex
    Groups         : base
    Provides       : None
    Depends On     : ncurses
    Optional Deps  : s-nail: used by the preserve command for notification [installed]
    Required By    : None
    Optional For   : None
    Conflicts With : None
    Replaces       : None
    Installed Size : 290.00 KiB
    Packager       : Evangelos Foutras <[email protected]>
    Build Date     : Sun 06 Sep 2015 03:34:15 PM EDT
    Install Date   : Fri 18 Sep 2015 10:33:33 PM EDT
    Install Reason : Explicitly installed
    Install Script : No
    Validated By   : Signature

https://www.archlinux.org/packages/core/x86_64/vi/

    root@dicks:~# which vi
    /usr/bin/vi
    root@dicks:~# file /usr/bin/vi
    /usr/bin/vi: symbolic link to `/etc/alternatives/vi'
    root@dicks:~# file /etc/alternatives/vi
    /etc/alternatives/vi: symbolic link to    `/usr/bin/vim.basic'
    root@dicks:~# file /usr/bin/vim.basic
    /usr/bin/vim.basic: ELF 64-bit LSB  executable, x86-64, (snip)
    root@dicks:~# vi --version
    VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jan  2 2014 19:39:32)