I’ve read via the Yahoo Messenger announcement that YM and MS Windows Live Messenger will no longer be interoperable starting December 14, 2012.

I am a fan of instant messaging apps. I remember those good ol days when I still have ICQ and AOL IM (together with YM and MSN/hotmail) and Trillian was my pop tool to manage all the IMs. So don’t be surprised if this YM and MSN messenger interoperability is a sad news for me. Honestly I have loved their inter-connectivity for a long time and I got a lot of MSN/Hotmail contacts in my YM account.

Quoting the YM Blog:

Yahoo! Messenger interoperability with Microsoft Windows Live Messenger

Yahoo! Messenger will no longer be interoperable with Microsoft Windows Live Messenger as of December 14, 2012. Microsoft buddies will still appear on your Messenger contact list, but they will be greyed out, and if you try to send instant messages to them, the messages will not be delivered.

This is just one of the several EOS’es that Yahoo announced last November 30. Yahoo! Messenger Public Chat Rooms, Yahoo! Messenger Pingbox and Yahoo! Voice Phone In and Phone Out are the other features that will not be continued.

I don’t have other info about the YM and MS Messenger breakup but maybe both instant messenger projects are low priority in both tech companies so it’s very easy to say it will be not be functioning altogether. Maybe the revenue is not good or maybe this interconnection is too costly to maintain. Maybe the Skype acquisition and current MSFT integration or the direction to move to the outlook.com model played a key role coming up with the stop interoperability decision.

Read more about this story the Yahoo Messenger Blog post.

Are you a Yahoo Messenger user too? Or maybe a Microsoft Windows Live Messenger user? Or maybe BOTH? What are your thoughts on this breakup? Feel free to leave your comments at the end of this blog post.