Hello Swift Community,
The review of SE-0098: "Lowercase didSet and willSet for more consistent keyword casing" ran from May 24…30, 2016. The proposal is *rejected* for Swift 3.
The feedback on the proposal from both the core team and the community was that these should remain camel cased, particularly given that they may become user-definable aspect names in a future release.
Many thanks to Erica Sadun for driving this discussion and writing the proposal. This was an important topic for the community and core team to re-evalute.