Maybe you have an idea how to migrate with data?
Copy / paste doesn't seem like the best method.

Even in the form of a spreadsheet / .CSV, there is no import / export

I would also like to be able to export.
Sometimes a good form of cleanup is to export to a spreadsheet and then re-import it.

This would give more freedom and flexibility.
Functionality very desirable.

Especially for people who already use other systems.
This would be a very flexible solution.