Eh, I don't know, I don't think so absolutely. I think in the general "application" paths yes there's less complexity but as a language overall, no.

The thing is Rust has all the same capabilities of C++, that is to say, everything. With that same strong emphasis on free abstractions - meaning, abstractions that do not cost anything more than if you wrote the implementation yourself.

Templates and stuff are a rabbit hole but if you go down the path of procedural macros and generics in Rust it's more of the same. It gets crazy, wild, and super complex. But most people don't have to worry about that, because these sort of "squeeze every last bit of juice" features are most useful for library authors.