You did know that David Plummer spent about as much time with it for XP and the famous disk partitioner, adding maybe a few draw tweaks here and there? The new UI looks barely different, putting the articles in the left pane into the ui above kinda makes sense. It's actually looking a lot more like Win Virtual machine manager UI now.
KISS is a typical old school programming element forgotten by modern devs. That's why Windows today sucks in so many ways. This design and taking a day to do means that it wasn't broken and didn't need much changing.