> In an ideal world, what you want is more like copy-on-write. Share the code until one of the clients of that code needs a change that the others do not, then

> In an ideal world, what you want is more like copy-on-write. Share the code until one of the clients of that code needs a change that the others do not, then copy it. Good point. The problem with that is, of course, that you may not be aware of others existing. > There is no silver bullet... +1