This is precisely why I think modern approach to software UX and design is crazy. Like 15 years ago, in the Windows hegemony every sane designer was heavily relying on widgets, metaphors and flow defined by the system and MS could almost flawlessly upgrade the look of the entire ecosystem with XP's Luna. And without breaking the user experience.

Now everybody is looking for some virtual perfection in a different place and the user gets an awful, inconsistent, non-customizable and anti-interoperable clutter. WHY?