It would be good if people started adding team size, project size, codebase size, complexity of assigned work, etc to their answers to provide a bit more contex

It would be good if people started adding team size, project size, codebase size, complexity of assigned work, etc to their answers to provide a bit more context. I'm currently working in a team of roughly 60 developers on a 2-3 million loc system. First contribution is usually within 2 weeks. We tend to start new developers on straightforward feature work. We used to start new developers on bugs but found there was far too much tribal knowledge required. We couldn't use bugs to gauge if there was a skills gap. For senior developers it usually takes around 12 months for them to be performing at a senior level.