I believe "Debian GNOME", "Manjaro KDE", or "guix sway" are very valid answers to "what system are you running?", don't you? I wouldn't list all userspace components for sure, but some can be relevant to include.
"GNU/Linux" is a relevant label to me so i know we're talking about a system which has common POSIX-inspired utilities... "Linux" can be Android for all i know, which is a very different system.
I agree. It makes complete sense to mention the distribution you're using. Saying you use Debian is much better than saying GNU/Linux. People understand perfectly what sort of software Debian distributes, there is no need to mention anything else.
Mentioning that I use Arch Linux annoys people for some reason so I stopped doing that. I just say I use Linux.
"GNU/Linux" is a relevant label to me so i know we're talking about a system which has common POSIX-inspired utilities... "Linux" can be Android for all i know, which is a very different system.