Yes, it's a good summary of points, although a few are very much a personal preference ({} delimiters).

What's not discussed is the layer below the language that so often ties us to it anyway: linkage. C also does not require anything that can be called a "runtime", although you usually get some in libc. These factors result in it being easier to write libraries in C that can be imported by FFI into more modern languages than the other way round.