The question is then who should reserve it? The IETF can ask for domain names for technical reasons, i.e. as part of internet standards. ICANN can allocate do

The question is then who should reserve it? The IETF can ask for domain names for technical reasons, i.e. as part of internet standards. ICANN can allocate domains as gTLDs but doesn't have mandate/policy to reserve names without using them. Effectively .home is reserved because there is too much use to safely allocate it. Finally, IETF can recognise .home as a special domain that is used locally. But that didn't work out because an insecure delegation is needed for DNSSEC. Purely formally, ICANN has 'at large' structures that represent the interests of users.