With Version 0.79.0 I added more enhancements namely bulk import and export and the option to prune categories and assignments that do not exist in the JSON import file. The import should also print warning messages if multiple instruments are matched by one entry in JSON.
This is not done yet. One thing still on the list is how to learn about the not yet classified instruments. I am unsure if I want to include them in the export (and potentially duplicate them when doing a bulk export). Alternatively, I could create a separate export file. Finally, I want to add the option to call an external script for updating - that script gets the exported taxonomies, runs, and after that the import dialog is started. Stay tuned.