[fsflover]

You forgort to mention that the actual reason to call it GNU/Linux is not so much these technical details, but to attract attention to the GNU project and its fight for freedom (while Linux is just "open-source").

Upd: https://www.gnu.org/gnu/why-gnu-linux.html

Quote: Granted that the GNU Project deserves credit for this work, is it really worth a fuss when people don't give credit? Isn't the important thing that the job was done, not who did it? You ought to relax, take pride in the job well done, and not worry about the credit.

This would be wise advice, if only the situation were like that—if the job were done and it were time to relax. If only that were true! But challenges abound, and this is no time to take the future for granted. Our community's strength rests on commitment to freedom and cooperation. Using the name GNU/Linux is a way for people to remind themselves and inform others of these goals.

[smichel17]

Yes, it's the same reason to say Free Software, or FLO[1] Software, instead of Open Source Software. Technically the definitions are the same, but they have a different political message.

[1] Acronym for free/libre/open

[atomicnumber3]

Tbh there’s also the growing real need to specify that you’re talking about a GNU userland. At this point it’s not very rare to see Busybox and the many others that exist mentioned while googling for things.