I second this as a recent learner. I have been learning Rust by writing some toy code over the weekends, and 9 out of 10 times when I hit a roadblock and went

I second this as a recent learner. I have been learning Rust by writing some toy code over the weekends, and 9 out of 10 times when I hit a roadblock and went to my local Rust Users Group, the answer was "just wait for GAT". Turns out these patterns occur organically out of fairly mundane needs of abstraction (e.g. the now-infamous `LendingIterator`), and especially for me as a C++17/20 daily driver, _arbitrary_ limitations on expressivity. Don't get me wrong --- Rust feels a lot more expressive than C++17/20 in the vast majority of areas, but for the rest maybe 10%, it's pothole land for stable Rust. Eliminating some of these potholes is a big win for Rust's adoption story.