[Klonoar]

Eeeh, I run a few web services on a Rust stack and follow a similar pattern. Performance still tops a comparable Node/Python setup; I unfortunately am not a Go user beyond dabbling so can't comment there, but I suppose I'm just weighing in to say "I've not hit issues with this".

Often times, I Box something and tag it with a "review this" for later. If it somehow becomes a bottleneck, well, it's relatively simple to solve in most web-framework use-cases. Haven't really needed Rc, only needed Arc for shared data structures (rare).