List literals, dictionary literals, tuples, bigint literals, byte strings, f-strings, sequence unpacking assignment, named parameters (kwargs), decorators, closures (functions within functions), metaclasses, generators, async, list/set/dict/generator comprehensions, multiple inheritance, natural JSON support, ...
"C Is Not a Low-level Language, Your computer is not a fast PDP-11."
C only "maps really well" to PDP-11 style machine code. If you want SIMD, parallel algorithms, heterogeneous programming, memory hierarchies/domains, etc then ISO C is completely useless.
And even then, it's impossible to write something like malloc() without using either an external Assembler or language extensions.
