FritzBoxes are used as voip server/bpx, printer server, nas, and home automation. And probably more. (German) telcos provide specific FritzBox configuation inst

FritzBoxes are used as voip server/bpx, printer server, nas, and home automation. And probably more. (German) telcos provide specific FritzBox configuation instructions (select correct sub-branch of provider and contract kind), adding the quest to get real connection data to the attempt to migrate to anything standardized. Switching to something else is not as easy as buying a new modem for most normal people.