Earlier quoted context omitted.
Some might think C++ will take years (few years I was hoping 2025, but seems unlikely now) to catch up to Rust in some important ways.
C++ is losing momentum as larger organizations lose interest in investing in it. Features standardized in c++20 are still not available in the most popular compilers, let alone features in c++23. The future is looking bleak. Rust is a great alternative for greenfield projects but we really need a new kotlin-esque innovation to keep c++ alive imo.
"A few years" was also the feature support cadence of '17 through '11 features.
And, before that, the 3-year release cycle wasn't a thing yet.