>heavyweights like Word or Photoshop are written in C++ and Rust may be a realistic migration
Especially we've gotten used to so many of C++ shortcomings that we don't see them, but someone learning both Rust and C++ will (I'm sure) have a better experience in Rust. Even just the built in tooling (Cargo test, Cargo crates, rustup, etc.) feels so much more mature than when you're in 2018 looking at how to compile some C++ without an IDE.
Especially we've gotten used to so many of C++ shortcomings that we don't see them, but someone learning both Rust and C++ will (I'm sure) have a better experience in Rust. Even just the built in tooling (Cargo test, Cargo crates, rustup, etc.) feels so much more mature than when you're in 2018 looking at how to compile some C++ without an IDE.