Also when we eventually start talking to agents that perform the whole execution steps by themselves, that is kind of irrelevant.
Except for the lucky ones that still code to keep the infrastructure going, which is mostly C++.
If C would be so hardwired to the PDP-11 architecture it would have died with it. In reality C works just fine on all sorts of hardware (like GPUs) with only minor extensions.
I am also tired that language extensions in C to work around ISO defencies is considered an advantage when argued by C folks, while at the same time it is considered a language design fault when the same crowd points to other programming languages.
The PDP-11 had both 8 and 9-bit bytes. Thats a complexity that few programmers have to touch on, today.
Basic stuff like SIMD, SIMT, without requiring users to go beyond language extensions, something that any programming language can offer in similar capacity?
> something that any programming language can offer in similar capacity?
By your measure a lot of other languages don't offer anything to begin with, because they do not have a standard at all, only a reference implementation.