Guy English: Regarding Objective-C & Copland 2010:

'“Copland 2010” refers to a series of articles, written in 2005, and a recent episode of Hypercritical, in which John Siracusa argues that at some point down the line Objective-C and the Cocoa APIs are going to have to be replaced with more modern technologies. Failing to address this sooner rather than later, as was the case with the Classic Mac OS, will leave Apple in a vulnerable, perhaps insurmountable, position relative to their competitors who have adopted “modernized” development technologies.'

Guy argues against this idea.