Yeah, the examples are too simple. Things can get tricky if you start modifying the container you're iterating, especially with deletions. OTOH iterators can m

Yeah, the examples are too simple. Things can get tricky if you start modifying the container you're iterating, especially with deletions. OTOH iterators can make this impossible (e.g. through borrowing in Rust) or at least detect "iterator invalidation" at runtime. In certain programs it's also easy to modify the container by accident, e.g. if you call a function that triggers an event that indirectly modifies your container. If you do arithmetic on iteration variable, especially if the loop body has conditionals, then it's harder to follow the code, and easier to make off-by-one errors or infinite loops. Not every loop is clearer with iterators, but some idioms like `.filter()` or `.any()` are clearer and even shorter to write.