My hope is that, over time, we figure out simpler ways to achieve the safety goals that Rust is pioneering right now, and so there will be simpler/easier alternatives that do the same.

If in ten or twenty years we can't do better than now, we've failed to make progress.

So yes, in the future we will hopefully consider Rust "too complex".

(Disclaimer: I don't have much experience with Rust, speaking as an outside observer).