For junior coders, sure. As you become a senior engineer, your job is going trending to be more about design and communication, and less about coding. If you are at a place where the entire team can write their documentation in Markdown, LATEX, etc and design in PlantUML or other markup, then that's all in the repos, but most shops are (cringe) MS Word, Magic Draw, etc. There are artifacts, but they aren't as clear cut as a PR.