Interestingly, some of these absolute truths are absolutely true at larger (50+ devs, or so) companies because forward progress can't be made otherwise. System

Interestingly, some of these absolute truths are absolutely true at larger (50+ devs, or so) companies because forward progress can't be made otherwise. System not documented? Might as well not exist at all. Code is not tested? Well, then nobody really knows if it works or not after even the most insignificant and peripheral changes. People don't treat code quality as a priority? Welcome to days/weeks/months of yak shaving to fix even the simplest issues. Good at communication but can't code worth a damn? Consider becoming a manager, not a "senior developer".