That’s a bit disingenuous wording as modern hardware that can run without proprietary firmware is an absolute rarity at this point.

But it's not impossible, nor is it something that can't be solved in the future with CPU architectures like RISC-V.

The project should have really kept the GuixSD name. Much clearer separation and also sounds a lot better.

Agreed.

package managers who attempt to sweep nonfree software under the rug and try to make the issue invisible.

I should have been more clear, excluding nonfree blobs were widely decided to be a lost cause across the distribution space. The final being Debian very recently. Tbh I do sometimes wish that Guix took the Nix approach with hardware-configuration.nix, but the fact remains is that the Guix maintainers do not wish to maintain nonfree packages and I respect that decision as Guix doesn't go out of its way to prevent others from installing the nonfree blobs/packages themselves.