Many of those languages indirectly have lots to do with C – even if you ignore the obvious problems like "C is the only ABI supported by most OSes, C FFI is the

Many of those languages indirectly have lots to do with C – even if you ignore the obvious problems like "C is the only ABI supported by most OSes, C FFI is the only cross-language interface supported by most languages and thus most libraries", there's more subtle influenced: Copying e.g. the (very expensive to implement in hardware) cache semantics of C usually "costs" languages nothing, because the hardware is already there, due to C. Not copying them happens, if both language and hardware get developed at the same time, but it's much rarer. You see similar problems with things like vectorization – Rust was in a good position to define semantics more amenable to ARM SVE / Risc-V VE, but all existing SIMD libraries are written for C and x86 semantics, so that's what Rust is currently stuck with, as are most other languages.