Most corporate codebases I've encountered are, to put it mildly, unpleasant. In most cases, you've got dozens of people with varying skill and style maintaining

Most corporate codebases I've encountered are, to put it mildly, unpleasant. In most cases, you've got dozens of people with varying skill and style maintaining the stuff over a decade or more. New business requirements are patched on top, without ever considering the whole architecture. The cleanest codebases are those where the project has a focused goal and is maintained by a few developers with a low churn rate.