Re: CC Mode in MMM Mode(s).

[Richard Stallman]

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  > - No need to worry about putting the buffer into a modified state.

I understand that.  Text properties are designed to be considered
part of the contents.  But font-lock uses them, so it is possible
to use them for things that reflect the contents and are not contents.

  > - Overlays expand when you insert some text inside. By default, mmm-mode 
  > doesn't re-parse the buffer into submode chunks automatically (probably 
  > because of performance concerns, more apparent back in the day), so that 
  > was probably useful.

Text properties expand, too.

  > - Overlays have properties. It's a more meaningful data structure, I 
  > guess. Easier to build with.

Do you mean, it is useful in the code to have a single overlay object
to put the properties on, rather than putting them directly on the
characters in the buffer?

-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
Skype: No way! See https://stallman.org/skype.html.