This IDE doesn't seem to differ from CLion with Rust plugin. I guess, its only about making Rust plugin paid from their side – which makes sense from their side. I hope they can deliver quality. On the other hand, they are notoriously slow to develop their IDEs. Features are super slow to be delivered, IDEs themselves are not really improved as well. They are focusing on things most don't care: Spaces, new UI project…
That's how all their IDEs work. It's all the same software with different sets of allowed plugins. I would also argue that their IDEs are largely mature, feature-complete software. I'm quite happy they haven't succumbed to the modern trend of reorganize all the menus every 6 months.
Same, so they do it every 2 years instead.
But the upside is the Shift+Shift Menu of "Find anything in this Project or what the IDE can do for you"... I wish more software had this :)