I have experienced this personally in a couple of companies I worked for - Just like mentioned in the article, they had high staff turnover. What happens is tha

I have experienced this personally in a couple of companies I worked for - Just like mentioned in the article, they had high staff turnover. What happens is that nobody truly understands the codebase and it requires many more employees to maintain. To make matters worse, it's also a self-perpetuating cycle. It's more a management issue than an engineering issue.