> The entire C, C ABI and standard lib specs, combined, are probably less words than the Promise spec from ECMAScript 262.
Not if you look into C23, include all the compiler extensions devs keep thinking are part of ISO C, and the "C ABI" is one per each existing OS written in C.
C23 did not increase a lot. The core language spec is also very small. Extensions are also often relatively simple, but most importantly, one does not have to use them. ABI is usually not per OS but per architecture.
