I've spent a decent amount of time using Xcode over the years. But in the past few years, I've been using a few other applications such as IntelliJ and VS Code, and I've started to realise that Xcode seems to be missing quite a few features.
Occasionally I complain about this on social media, but I thought it would be better if I documented my complaints here. So, I've now created a new page, What is Xcode Missing?, which I'll regularly update as I get annoyed using Xcode.
The initial list contains annoyances around duplicating files, not having a concept of a code style, and project navigation.