Bulk import of users as CSV, but no bulk export ?

There is a "Bulk Import" feature to import users from a CSV file, but there is no corresponding "Bulk Export" as CSV. Only XML and JSON.

I wanted to tranfer users from one instance to another, so it looks like the only way is to write my own CSV exporter using the API. And the specification of the CSV import doesn't include the fields for all the data I can export. For example, I don't see how to include the timezone of the user in the CSV import.