[cageface]

IB is a mess:

  - No way to define reusable styles. 
  - No way to compose layouts out of other layouts.
  - Trait classes are way too coarse to be useful.
  - Versioning of Storyboards is a nightmare.
  - Anything beyond trivial auto layout editing is useless.
  - Segues force you into stringly-typed APIs.
  - @IBDesignable is still super buggy.

I've been much much happier since I dumped it and started doing everything with SnapKit.