I think dhh said, great frameworks/libraries are extracted, not created from scratch. That would mean, someone building a (successful, money making) web application in Rust and building their own framework as they go, open sources that framework and then continues using it for their production applications.
I have not seen such a success story for any Rust web framework yet. Although I would love to see one (or more!)
- Regular Web / Services: IMHO, Go, Java, .NET are better candidates there
- IoT devices with Web or API interfaces: Rust is good there. Access to I/O resources etc.
- Extreme high-performance services: Something like a DNS-over-HTTP or wall street data brokers. But for that you need a VERY solid server (but most likely not a framwework).
The regular web case will not produce a framework (out of commercial success), it is much easier to opt for a traditional languages/frameworks and hire inexpensive developers for that. The extreme high-performance services will not produce the framework you want and the likelihood is very small because the number of companies doing that is very low. Leaves the IoT space, which, IMHO, has the best chances BUT will not be the one optimized for your big server machine scenario.
I have not seen such a success story for any Rust web framework yet. Although I would love to see one (or more!)