I don't really need to find those examples, I've written most of my company's product in Rust using async, for years, and it's never once been an issue. That's 100s of thousands of lines of rust written and 0 async issues.
Totally valid, but you could also say the same thing about C and C++, i.e. you can wield your tool with mastery, then that's awesome. But I think the average startup would likely struggle needlessly when they really just need to ship products that people want/need to use. Rust is likely not the smartest choice for the average startup.
Only one person at the company had previous professional experience with Rust. The majority had 0 experience with it at all. We've had no trouble and it's actually been our most productive language - we're moving away from Python and Typescript where possible.