The article doesn't really give any good details. We don't know enough to say what the process is. We're just supposed to be upset that young bright engineers are working on the system that until a month ago everyone would have agreed is a pile of garbage.
I'd love to know more about what the plan is - but as a older software engineer "young smart kids attempt to start maintaining ancient abandoned but important codebase" is good news, not bad news. It's what we beg for in Slack all day long.