> except the IntelliJ Rust plugin is deprecated

This is incorrect.

https://plugins.jetbrains.com/plugin/22407-rust

The current Rust plugin is not deprecated. Perhaps you are confusing it with the old plugin (https://github.com/intellij-rust/intellij-rust?ref=chillfish...)

They're still making releases (latest 4 days ago) and there is no mention that the plugin is deprecated.

In fact: https://blog.jetbrains.com/rust/2024/05/21/rustrover-is-rele...

"IntelliJ IDEA Ultimate will include support for the Rust plugin for free. However, to use the plugin in CLion, you’ll need a commercial RustRover license or buy it separately. "

> so there's currently no single IDE that fully supports Rust + web projects

Wrong. Latest IntelliJ with Rust plugin and whatever web plugins you want works fine.