I think it's a good time to rehash this request.
Raster function of ArcGIS Pro is good, however, loading this "Region Growing"
will strengthen it more.
Us cases:
- Flood analysis
- Getting homogeneous training samples for future product concerning AI like deep learning as well as Image Classification
Regards,
Makoto Ohashi, Asia Air Survey, Japan
Makoto, I suggest posting this as an ArcGIS Idea. (Click ArcGIS Ideas at the top of the GeoNet page.)