I’ve been writing high performance C++ for a while now and this is true. We rarely have memory leaks or use-after-free and when we do, they’re pretty mild. It is one of the easier problems to avoid, especially if you enforce standards on developers to avoid the most common mistakes (eg the new keyword should be avoided if possible unless providing an rvalue to initialize something safer). I can imagine new or bad developers without strong guidance, or under extreme pressure to ship, would have a harder time with it though.

Concurrency is a much harder problem and something we deal with more often. I would consider memory management close to not a concern.