For me, that blog post translates to "the only reason to not use Rust is if something/someone won't let you."
Regarding the C++ discussion, when I started programming the only viable oss version control system was cvs. It was horrible, but better than nothing. Then subversion was created and it was like a breath of fresh air, because it did the same thing well. Then alternatives exploded and among them git emerged as this amazing, amazing game-changer because it changed the whole approach to version control, enabling amazing things.
To me, Rust is that git-like game-changer of systems programming languages because it changes the whole approach, enabling amazing things.
I am curious to see if there is another wave of things better than git/Rust in my lifetime.