Because most tasks aren't "refresh this code from 10-20 years ago"?

If you needed an old piece of code at $WORK, you probably already paid the tax of refreshing it or replacing it.

This sort of task is similar in nature to something like "I have a 25yo unmaintained Linux driver, let's refresh it for modern Linux" - a great demonstration of the efficacy of these tools if you have the right-shaped task, but not a task that comes up repeatedly in most people's days.