JetBrains 的下一款 IDE 会是面向哪门编程语言的呢？

Does JetBrains have plans for a stand-alone Rust IDE?

There are no such plans at the moment because we don’t see additional value a separate Rust IDE would bring. It would require almost the same support as we already have for C/C++ in CLion, as well as C/C++ support owing to the widely-used language interop. From JetBrains’ standpoint, a potential Rust IDE equals CLion with the IntelliJ Rust plugin, so it doesn’t make sense to invest resources in developing and supporting a separate product.