A few days ago I promised to write down some of our thoughts about the open sourcing of BlueJ and Greenfoot.
In the past, we had consciously decided to keep the source closed. Now we decided differently. So that brought about the change?
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Kathy Sierra, on her excellent blog (which may have very sadly come to a close now, but that’s another long and sad story) has recently published a collection of her favourite graphics from the last few years.
Here is one that I really like:
(By Kathy Sierra, from http://headrush.typepad.com/,
shamelessly copied without permission – I hope she doesn’t mind!)
You should really look at the site yourself – there are many more great diagrams!
The Featuritis diagram above struck a nerve with me, since it’s something that’s been close to my heart for a long time. It is also related to what I think is one of the Natural Laws Of Software Development:
Every open system develops towards the unusable.
If you want to find out why I think that, read on.