To add to this: I can appreciate the significance of GNU, especially in early Linux distributions, but the position of "GNU was the real OS, Linux was just the kernel" is also deceptive, IMO.
Sure, a lot of the userspace was GNU, but a lot of it ... wasn't. Things like PAM, the init system, and the network config tools, off the top of my head. A lot of system-specific tools come from "not-GNU", too.
You can't discount how much of early Linux was "GNU", and how big a deal GCC and GNU libc (and the rest!) were, but it's disingenuous in my opinion to call GNU an "operating system" that you just plugged Linux, the kernel, into. Even today, as far as I can tell, there is still not a true GNU system. Guix comes close, in terms of being "GNU-ish", but the most usable Hurd distro (AFAIK!) is Debian, where, again, a lot of components come from Debian, rather than GNU.
And, as you say, modern systems have drifted even further from being GNU. They have lots of GNU components, but so did, say, the Sprite OS, or a lot of 4.4BSD derivatives.