The most successful software in a field is typically NOT the best software. The authors of the article live in a world that does not exist. Clean code lost, many years ago.

Even with enough money, you may not be able to attract/keep talented engineers who are willing to put up with such a work environment (the codebase itself, and probably the culture that led to its state) and who want to ship well built/designed software but are slowed down by the mess.