This tool is so you can dump all of your Trello data into local files.
This tool was creatd because one of the teams I manage was migrating their project management from Trello to Phabricator.
At first, it was one script to export and import all in one.
However, we kept having to repeat the process while we dialed in the importing functionality.
This meant we kept running into API rate limits.
So, we split that big script into two parts, this exporter and the importer.
Now this exporter can be used for your process to migrate Trello to anything else.
You'll just have to write the importing half.
It's also possible to use this as a simple tool to archive your own Trello.