Other than that, opinion seems divided on whether for a home LAN it
makes more sense to leave domain name unset, or to provide a value
(picked carefully, perhaps ending ".test" or ".invalid"). In some
ways
I like the idea of providing a planned/known name, if only because I'd
recognise it for what it is if I saw it in error messages, logs etc in
future.
I almost wonder if, to avoid any potential name conflict, one would be
sensible to register a domain, and then NOT have it point at one's own
home LAN - because unless a dynamic DNS service is used, how could
one keep that uptodate (my cable internet ISP does change my WAN
ip address occasionally) - and use its name on the home system. But
then again that might have unintended consequences.