You can configure many routers to act as DNS servers, then advertise themselves to client devices as a DNS server (with a secondary like 8.8.8.8 or whatever). Then you can just use the hostname of the device you want to access and as long as your client device is using your router for DNS it will resolve correctly.
How specifically to set this up depends on your networking equipment
I’m definitely in the “for almost everything” camp. It’s less ambiguous especially when you consider the DD/MM vs MM/DD nonsense between US dates vs elsewhere. Pretty much the only time I don’t use ISO-8601 is when I’m using non-numeric month names like when saying a date out loud.