My impression is that the Rust developers and community are firmly in the practical camp. They will keep plowing at Rust and its ecosystem. They will improve and optimize every nook and cranny they can find.

I wouldn't be too worried about Rust, it will have a niche at least as big as Ruby's is and IMO it will be way more entrenched since its target domain moves way slower and the barriers to entry are way higher than for scripting languages and web frameworks, IMO.