It's true that the borrowck is what checks you didn't screw this up in Rust, but "it's your job to never make mistakes" is just how C++ always works
If you keep const pointer to a std::string in C++ in 2016 that's exactly the same danger (of dangling pointers) as for a std::string_view in 2026, there's no change to that part.
If you keep const pointer to a std::string in C++ in 2016 that's exactly the same danger (of dangling pointers) as for a std::string_view in 2026, there's no change to that part.