Not the commenter but embedded embedded here so my perspective is a little different. For me, constexpr for resolving complex build-time logic into constants,

Not the commenter but embedded embedded here so my perspective is a little different. For me, constexpr for resolving complex build-time logic into constants, cleaner type handling for the math library makes it harder to accidentally pull in a 64-bit libm when we only have a 32- it FPU, and templating for sure. It's pretty easy in C to reach a point where macros of macros is madness but templates calling templates still works with the debugger and is a powerful mechanism for hoisting complexity out of loops. Also works nicely for writing outer loops once in c++ calling a template specialized to either inline assembly or c++. Managed pointers sometimes but our team seems pretty good with object lifetimes from a C background, and we don't use too much heap anyway. RTTI and exceptions we often disable to save code space. RAII is a little tricky without exceptions, we often use it's easy.