This fits with my recent experience. I've spent the last 2 months working on a large open-source Rust project, and it's been mostly easy; I make self-contained

This fits with my recent experience. I've spent the last 2 months working on a large open-source Rust project, and it's been mostly easy; I make self-contained changes that fit into the existing architecture and I don't have to think too much about lifetimes or the borrow checker. But when I go off-track and work on my own Rust projects, things get a lot harder.