So long as correct programs are incorrectly rejected, and it takes extra time to fix those mis-matches, many people will simply avoid the pain in the first place.

At the end of the day, many of us are paid to ship features. For many industries, correctness and safety just can't compete with new features. It's the reason Lisp, Python, Ruby, and Go are so popular - you can quickly write programs which are both fast enough and memory safe.

The gaming industry, one of the bigger C++ consumers, will also probably not move to Rust for similar reasons: hitting a schedule is much more important than not crashing or not having memory leaks. You can always patch a game.