That's actually one thing that I really like about Rust, since everything is static linkage by default it's easy to make pretty sweeping changes, on nightly you can even recompile the stdlib with different configurations(I.E. Oz/Os) if you want.
Static linkage is not there only by default but it is actually the only option because Rust doesn't have a stable ABI. I personally don't consider this as an advantage and in C++ you can also statically link against the standard library if you wish to. I don't see many valid reasons to do so but the option is there.
in practice ABI compatibility is holding back libstdc++ more than anything.
I haven't yet found convincing arguments other than cargo cult programming ones. But I'd be glad to hear concrete examples if you have some and I'll be happy to discuss.
See Carbon.
I did. And?
They're making the argument that it is, abd even holding back C++ itself, which is why they started their own C++ fork.