Re: position on changing defaults?

[Richard Stallman]

    I can not see what the advantage with an interactive spec over a 
    property on the function name is. Could you please tell?

The interactive spec is where you specify other things about how to
call the function interactively.  So it is a cleaner interface to put
this in the same place.

    And for the actual implementation of activating/deactivating the mark I 
    can not see the advantage of doing it directly in the command loop 
    instead of in special hooks before and after pre/post-command-hook. 

Using those hooks is unreliable and slow.