The reasoning given for progress being slow on this is a good example of the challenge facing open source projects with no leadership structure or formalized long term planning. Without structure, important but "boring" projects are often left by the wayside in favor of shiny new things that are more fun to work on. More than my original reasoning, the arguments Heather brings to the table make it pretty clear something must be done about this issue, and that may require prioritizing data anonymity over shiny new Customizer features. With great power, and 27% market share, comes great responsibility.