I agree with you. Spend enough time in an ecosystem and you'll eventually find a need to interact with most of its features.
My experience in Rust has been pretty positive. I'm writing a new book on systems programming with Rust and, as a result, have spent a great deal of time digging into the internals of libraries, the compiler. The compiler is, by far, the most surprising because it's allowed to use nightly features in new and interesting ways. Everything else, when I encounter something new to me, I'm able to understand from the Rust documentation. The key differentiator with C++ is, I think, the focus on documentation and ensuring that new features are explainable in a simplistic way. This helps make new features introduced into the language jive, to my eye.
That said, there are areas of the ecosystem _outside_ the language that are hard to keep up with. The future notion in Rust used to be like that, before Future was included in the base language. That's tricky but, again, I think Rust strikes a good balance here: conservative about content in the base language, enthusiastic experimentation in the ecosystem. It's possible that this'll break down some day but it hasn't yet and I don't see it as happening soon.
My experience in Rust has been pretty positive. I'm writing a new book on systems programming with Rust and, as a result, have spent a great deal of time digging into the internals of libraries, the compiler. The compiler is, by far, the most surprising because it's allowed to use nightly features in new and interesting ways. Everything else, when I encounter something new to me, I'm able to understand from the Rust documentation. The key differentiator with C++ is, I think, the focus on documentation and ensuring that new features are explainable in a simplistic way. This helps make new features introduced into the language jive, to my eye.
That said, there are areas of the ecosystem _outside_ the language that are hard to keep up with. The future notion in Rust used to be like that, before Future was included in the base language. That's tricky but, again, I think Rust strikes a good balance here: conservative about content in the base language, enthusiastic experimentation in the ecosystem. It's possible that this'll break down some day but it hasn't yet and I don't see it as happening soon.