[kouteiheika]

If you're just sending static pages, sure. Not if you're doing significant processing like I do. It's also an issue of scaling, where I could probably serve at least ~1000x more traffic on a single machine (and I know I'll never hit that much traffic). And if you don't need high availability (although I haven't had a single outage is over two years, thanks to Rust's reliability and focus on correctness) this simplifies your architecture and your deployment significantly, because now if you're on a single machine you don't have a distributed system, you don't even need caches, you don't need load balancers, you don't need to administer multiple machines, you don't need Kubernetes, backing everything up is very easy, etc.

(But of course, I'm not saying this is how everyone should do it. I'm just saying what the benefits are for me because Rust's so fast, so it allows me in my particular case to do this, which I wouldn't be able to do with e.g. Ruby because it'd be too slow.)