".local" required in SMB hosts on 64bit

[TheOldPresbyope]

...
And a NB on the use of *.local domains:
For local network naming convention (RFC 8375) we (the world) should use *.home.arpa
https://www.rfc-editor.org/rfc/rfc8375.html

But alas, people (of the world) use *.local even though that is an informalism.
https://www.rfc-editor.org/rfc/rfc6762#appendix-G

I think you have the cart before the horse. With RFC8375 the IETF hoped to stop the common usage of .home as a top-level domain in residential networks. You can consult the historical documents to see how .home causes problems.

The use of .local as a pseudo-TLD for mDNS and its recognition by the IETF predates RFC8375 by years.

As we used to say at my long-time employer, NIST, the wonderful thing about standards is there's so many of them (insert obligatory XKCD cartoon here) 

Regards,
Kent