Finally a world where everyone uses different hammers and no one can work on anything unless you can ask the hammer-oracle to reverse engineer the other people's hammers and nails
It's becoming harder if you understand those features and use them correctly, on top of your knowledge of unsafe C++. Even then those are opt in, and it still takes a tremendous effort. I don't trust anyone using C++ correctly. It's just hubris at this point. You can use unsafe and call C but that's a smaller surface area to audit. Most big companies are transitioning to Rust for a reason. Some big companies were trying to replace C++ even before Rust was a thing.