I've been able to find good libraries for everything I need on stable now that Diesel is on stable, so there's not really a requirement anymore to use nightly for most things.
For example, I use actix, which works really well. It's not as ergonomic as Rocket, but it's way faster and quite useable. The same is true for pretty much everything I need, so I only use nightly when I'm dinking around with something that doesn't need to go to production anytime soon.
I think `async/await` is the big one for network stuff. Rocket is the library I was thinking of when I wrote that, though.
My (possibly mistaken) understanding is that my coworkers who do more web servery stuff than me prefer actix to rocket for other reasons too, and wouldn't use rocket even if it worked on stable.
I don't really know the arguments around them, TBH.
For example, I use actix, which works really well. It's not as ergonomic as Rocket, but it's way faster and quite useable. The same is true for pretty much everything I need, so I only use nightly when I'm dinking around with something that doesn't need to go to production anytime soon.