I don't know if this was already requested in German forums, so I'm sorry if this is a duplicate.
In order to be GDPR compliant, the user should be able to request and receive all data we have about him, so it would be great if the user can download by himself this data in the frontend (e.g. in the user control panel).
I'm currently using this wonderful plugin by Hackerman but I think this should be something included in the Core (in a user friendly way). I'd also like to be able to export my data stored here at woltlab.com without having to open a ticket and waiting for staff to send me the requested data.