Rust also has features which interact in subtle and surprising ways. Generics and operator traits bumping into the "coherence" rules is my personal pet peave. I doubt any user would have predicted that interaction, and even though the compiler gives a detailed pointer to why, it's cold comfort.

Honestly, after hating C++ for years, trying to use Rust made me appreciate more about C++. I wish someone would make a language which took the best parts of both.