DPOs care about leaks, others not really.
Mist digitalization is done in the way that the paper form is now an html form. And every city tries to do it by themself, without cooperating with even their neighbours. And it doesn't get better at the higher level. ELSTER is one of the few examples where multiple agencys coorperated. It was developed by the bavaria branch of the German IRS and all branches use it now.