But Evolutionary Art does change. It is not meant to be static but it is also not meant to be ephemeral. Ephemeral Art is art that is not meant to last for a long time. It is made with materials or techniques that ensure it will be destroyed in a brief time.
Evolutionary art on the other hand is not meant to be destroyed or to degrade over time. The opposite applies. Evolutionary art truly does evolve. What it was yesterday is not what it will be tomorrow.
To understand it better, consider a simple example. You paint a cat on a canvas. Its a great cat and you are asked to show it in an art show. Sadly it doesn't sell. So you bring it back to your studio and there it sits for a time until you decide that you want to add another cat to it. So you add the other cat. The art is now no longer static. It has evolved. Its no longer the same piece you previously showed. It is something new. It hasn't degraded as ephemeral art does. It is still the original cat, but now it is something different.
Now repeat this process a dozen times. Each time you show it, then you take it home and you add another cat. Soon the canvas is covered in cats. And each cat is more interesting because over time your skill level has also been developing. On the 13th painting, you decide the first cat is kind of simple, so you paint over it, leaving the other cats around it. You've now evolved the piece further. When you stop is up to you?
In Assimilation Art we teach that no piece of art is ever finished. The only thing that is finished is the artist who decides the art is done. So what's the difference between Assimilation and Evolution? Assimilation teaches morphology (the study of the forms of things), it is the study of shape and the merging of art forms. Evolutionary art is just one part of a larger cosmology which is considered Assimilation.
So why create a piece of art that constantly changes? Its simple. Every time it makes the viewer question what has changed since it was previously seen. The fact of any piece of art is to make the viewer look at it, consider its meaning, its reason for being created, and to try and understand the message the artist is imparting within the work.