[bendecoste]

> Doesn't play well with source control. Even if the GUI builder spits out a text-based format like XML, it's hard to read and understand diffs, and it can be difficult to impossible to merge.

This is a bit more specific to Apple imho. Android layouts are also XML but much smaller and much more manageable in source control. The underlying xml of storyboard files are hundreds of lines long and often change just from opening the file, even if you don't change anything.

[mcintyre1994]

Visual Studio (admittedly on a WinForms codebase, but recent .net and VS) sometimes does something similar if you open a design file without changing anything or while changing something completely unrelated - except it also sometimes changes something like the base font or zoom as part of its random unexplainable changes and if you're not careful to remove everything you didn't want to change you'll ruin your layout.