@jni We have to deal with the reality that users hate moving outside of their eco-system.  I have never even considered using Fiji, even though I am sure it is a perfectly capable piece of software--even the license is right.  But it is written and Java, and there's no way I'm going to integrate Java tools into my workflow.  So, I'm sure you are right that this is not going to impress those folks outside of Python, but then I'd argue that those folks won't be interested in using our tool either way, no matter how good it is.