I agree, if we change "about ten years" to "at *least* ten years". Tongue only slightly in cheek. C++ took 25 years (C++11) to become, IMO, a compelling improvement over C.
I disagree with basically everything the coward said -- particularly wrt the Rust community which I think is great -- but I don't use Rust (yet), either. The things that irk me the most about Rust are the lifetime annotations, the fact that it's non-trivial to write a linked-list implementation, and a few issues that will go away after further development (overly restrictive borrow checker and compiler speed). The place it would come in most useful -- working in a corporate-ish environment with morons who don't understand ownership issues and who need a compiler to slap sense into them -- is also the place it is currently (due to novelty, immaturity, and inertia) the least adopted.
But, if Rust can get over some of its present hurdles, it has the potential to become a really good language. And, many would say it already is one today.