Makes me wish more apps followed the UNIX model of separating every feature into separate applications with well documented interfaces that only change when new features absolutely require it and otherwise are only updated for security patches.

> The testing that would be required to support toggles would be for 2^n

I don't think that's really true, unless the behavior of each toggle is tightly coupled to the behavior each other toggle.

Case in point - most mature apps nowadays do have hundreds of toggles for various settings and features.