The windows-specific issues are probably a large part of the problems that happen when you try upgrading Windows versions, e.g. XP to Vista, Vista to Win7, and no end in sight.
Based on what the article points out, I would speculate that Microsoft spends a lot of energy trying to catch and fix all the ways the registry migration breaks when doing an OS upgrade. Not only is that is all wasted energy, it will never hit 100% success rate because there will always be something the porting engineers never saw in their systems.
Based on what the article points out, I would speculate that Microsoft spends a lot of energy trying to catch and fix all the ways the registry migration breaks when doing an OS upgrade. Not only is that is all wasted energy, it will never hit 100% success rate because there will always be something the porting engineers never saw in their systems.