Sure, that's why they stopped receiving paper letters for tax declarations once they setup Elster.
Oh, wait, they didn't, my bad. You can still declare your taxes with good old paper. The only people that can't are self employed, and that's because they have a different set of obligations with higher demands
Telecoms shut down 3G once 4G had rolled out. TV networks killed DVB-T after DVB-T2 went live. Banks have abandoned FinTS for app-based 2FA.
Your comment compares a paper-based, non-digital process with a digital one. My criticism, however, is about abandoning an old digital (but vendor-neutral and inclusionary) process in favor of a new (and discriminatory) one.