I don't see much that's novel in the article, other than perhaps the rack dimensions. Corporate servers and workstations have been designed for easy, screwless maintenance for a long time, going back to the 1990s I think. I'm pretty sure I also hot swapped array drives back then by just pulling a lever. I can't remember the last time I needed a screwdriver for a corporate server/desktop; I even see laptops now (HP Elite line) that are screwless, at least the parts I've seen, and designed for easy maintenance.