c_vs_cpp: various improvements

c_vs_cpp.md

@@ -8,22 +8,27 @@ There are good reasons for using both languages:
 ✅ relatively low-level language
 ✅ much simpler language (no classes, templates, ...)  
 ✅ portable to a wide variety of systems
+✅ only does what you say
+✅ easy to mix with other languages
 
 ## Reasons To Use C++
 ?inline
 ✅ lots of helpful abstractions (classes, templates, ...)  
 ✅ feature-rich language (function overloads, `constexpr`, ...)  
 ✅ extensive standard library
+✅ stricter syntax
+✅ RAII prevents resource leaks
 
 ## Which Is Faster?
 Neither language is inherently faster than the other.
 In modern compilers, the exact same optimizer is used for both languages.
-Certain high-level C++ features can make it easy to inadvertently write inefficient code (e.g.
-innocent looking code performing large copies).
 
-One notable difference between the two languages is their standard libraries' string representation:
-C strings, while simple, are highly inefficient.
+C++ mostly benefits from its robust standard library, reducing naïve DIY algorithms and
+boilerplate significantly. It also uses an *exponentially* more efficient string representation
+than C.
 
+However, C++ can also hide slow tasks (e.g. allocations, large copies, exceptions, and RTTI
+lookups) behind seemingly innocent code, all of which would be obvious in C.
 ## Conclusion
 Both languages can be equally fast, choose the right language for your job, and the language you
 enjoy working in.