Ron Teitelbaum wrote:
> Hi Chris,
>
> There is also something to be said about simplicity.  It makes sense to put
> the time into extensibility when you find you need to extend something.
> Before that point it can do more to obscure the code.  If something becomes
> overly complex or opaque then the design might support expansion but people
> may opt for simplifying the design to make it easier to understand where
> they actually extended the code. 
>
> Ron Teitelbaum
>
>   

Exactly! Squeak suffers badly from this problem. Check Cuis: 
http://www.jvuletich.org/Cuis/Index.html .

Cheers,
Juan Vuletich