[layer8]

I think in the context of SSH, use of subdomains is very common and to be expected.

As far as laypersons are concerned, I would worry that they wouldn’t recognize foo.example to be a domain name, as opposed to www.example.com or blog.example.com.

[digging]

I forgot we were talking about SSH :)

But in your example, you're comparing different structures. "www.foo.example" is somewhat more clear.

[layer8]

Well, it was you who didn’t want to use subdomains. And with subdomains, we can just stick with sub.example.com/net/org.