You might also hire a younger who turns out to not work on bugs because it's beneath them. Or they only want to work on new projects because they went to some

You might also hire a younger who turns out to not work on bugs because it's beneath them. Or they only want to work on new projects because they went to some uppity college and it would just be wasting their education to work on "old tech". I've seen those. They suck to work with just as much as an older who is set in their ways. Honestly, age has nothing to do with either. It's personality.