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also a long-time rust user, and I buy this. one of the things it took me longest to realize when writing rust is to reach for traits carefully/reluctantly. they can be amazing (e.g. serde), but I've wasted tons of time trying to make some elegant trait system work when I could have solved the problem much more quickly otherwise.

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Exactly. Which is unfortunate, because the fact that Rust has true type classes is absolutely awesome.

But when dealing with traits, you have to remember the orphan rules, and the implicit object-safety rules- which sucks, because you might not have planned on using trait objects when you first defined the trait, but only tried to do so later.

Async definitely makes it even more painful.

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