At 16:43 -0800 12 Dec 2019, Emily Shaffer [off-list ref] wrote:

The contents of uname() can give us some insight into what sort of
system the user is running on, and help us replicate their setup if need
be. The domainname field is not guaranteed to be available, so don't
collect it.

The manpage on Linux says that it's a GNU extension; on Mac OS it isn't 
mentioned. So it would be more accurate to say that it's known not to be 
available on many systems rather than just not being guaranteed.

Besides that I think in some cases it may be considered sensitive 
information, so another reason to not include it. Perhaps even worthy of 
being mentioned as the primary reason.

+			    uname_info.nodename,

I think in some cases this could also be considered as sensitive 
information, and is unlikely to help in diagnosing problems.  So I'd 
move to exclude this as well.