Technology

But they are not the default option. And your new job may not use them.

Who cares if it's the default? If it's the best tool, use it.

It's silly to have a reason for "going Rust" be the build system, especially in the context of something as new as a WASM context where basically any project is going to be green field or green field adjacent.

Exceptions is a non standard exit point. And by "non standard" I'm not talking about the language but about its surprise appearance not specified in the prototype. Calling double foo(); you don't know if you should try/catch it, against which exceptions, is it an internal function that may throw 10 level deep ?

And that's a feature not a bug; it gets incredibly tedious to unwrap or forward manually at every level.

By contrast fn foo() -> Result<f64, Error> in rRst tell you the function may fail. You can inspect the error type if you want to handle it. But the true power of Result in Rust (and Option) is that you have a lot of ergonomic ways to handle the bad case and you are forced to plan for it so you cannot use a bad value thinking it's good:

You can do this in C++ https://en.cppreference.com/w/cpp/utility/expected (and as I said, if you feel so inclined, turn off exceptions entirely); it's just not the "usual" way of doing things.