C++ only needs 4 things: gradually-introducable memory safety, static reflection, first-class compile time string manipulation, and adoption+refinement of its modules feature.
Now, how willing WG21 and the compiler vendors are open to the idea, is anyone's guess.
class A {};
std::unique_ptr<A> array(new A[256]);
https://github.com/search?q=repo%3Achromium%2Fchromium+memor...
A few leaks fixed per month is nothing. Further there is no major language promising no leaks once you include things like retained references to garbage and reference cycles. Leaks are one thing modern C++ solves pretty well.
It's not indicative of anything average in the real world.