(= just because something isn't in widespread use yet/maybe hard to do doesn't mean it isn't used in targeted attacks. Or might become widespread after new discoveries or in combination with other vectors. And a lot of her work (e.g. Qubes OS) aims at making things secure on a very low level)
Also, some of these features are marketed and sold to us as additional protections, and I think it is important to see if they can actually do what they promise or if they just add complications, especially if they inconvenience users.