Adium has had a huge decline in users, though, since then, so the percentage isn't as informative.

For example, if you look back to a couple years ago, we had ~180k stats pings for the same week period[1] as we do now at ~20k[2].

I think what you're seeing/reporting here is that users who still use Adium are not entirely upgrading. That's probably true, but has more to do with Messages.app in newer versions supporting iMessage than anything else.

(I was one of the Adium developers for years. I don't even use it anymore because of the prevalence of iMessage and the decline in general IM.)

[1]: https://www.adium.im/sparkle/?year=2012&week=01&graph=bar [2]: https://www.adium.im/sparkle/?year=2014&week=51&graph=bar

That's too bad Adium is in decline. I've always tried to not rely on Apples built in messsaging and hoped a lot of other users still felt the same.