[philippeback]

One can save an image. I've done this thing https://github.com/Pharophile/HOImageSaver for example.

Nowadays, an image should not be considered as a long lived artifact, one would have a CI job to create the image. See https://github.com/hpi-swa/smalltalkCI

There is also Metacello with BaselineOf constructs etc.

Advantage is that when you get an exception, you just go back in the stack, fix, and then proceed forward instead of looking at a stacktrace and wondering what happened (yes, pdb is nice but not the same feel at all).