So the language is not as low level as it was before.
But it’s the hardware that has changed not C. As I said, with his argument Assembly isn’t a low level programming language either.
Besides, early risc cpus from the 80’s had out of order write back so this isn’t new. By the 90’s all risc were ooe. The first was the ibm 360 from the 1960’s.
I’d say C is still in the same place on the abstraction ladder it’s always been, but the floor is deeper nowadays (and the top probably higher as well).