It's hard to say. I think a lot of the Rust community actually hails from more of the web world, where security is rightfully a big concern, and the that's where actix was positioned. So maybe with something like HFT it wouldn't be as big of a deal.
On the other hand, very little of the Rust community actually does HFT, or understands the trade-offs. In HFT code, "caching pointers" to just about everything is extremely common, because it's super fast. So you'd be using unsafe a ton. If people got a glimpse of some of the code, I have a strong feeling that some subset would start lecturing (unironically, engineers with a decade of experience in HFT) about safety vs perf trade-offs, and ask "have you actually benchmarked", etc.
On the other hand, very little of the Rust community actually does HFT, or understands the trade-offs. In HFT code, "caching pointers" to just about everything is extremely common, because it's super fast. So you'd be using unsafe a ton. If people got a glimpse of some of the code, I have a strong feeling that some subset would start lecturing (unironically, engineers with a decade of experience in HFT) about safety vs perf trade-offs, and ask "have you actually benchmarked", etc.