2011/2/10 Daniel Friesen lists@nadir-seen-fire.com
Since we've already got some of these, would you mind getting me some aggregate data for skin preferences.
In particular I'd like to know how many users across Wikimedia (en.wp, maybe commons too might be enough for that kind of stat for now) are using the legacy skins.
The actual statistic may not reflect what the users actually want. I have an account with a few edits in a lot of projects and when i enter them for the first since the Vector switch i see that i still have Monobook there.
So this measurement should not just check the preference itself, but also when the user last logged in. If that's not possible, then at least when did the user made the last edit.
That said, i am all for deprecating old skins which are barely used and gathering clever statistics about preferences and updating the defaults.