The Nitrokey 3 implements various standards, which don't need any 3rd party tools to be provided by us in order to be used. So OpenPGPCard can be used with several tools: gpg, kleopatra, Thunderbird - FIDO2 is integrated into either the OS itself (Windows) or can be managed from within the Browser (Linux). For the "normal user" these functionalities can be directly used, without any other tooling provided by us. Although, I fully understand your point and we are working on the nitrokey-app2 to ease management tasks.