There are a few of us that use it (I do!). I really like having it, and I (personally) would miss it if it did go away. I just love talking to people, and it's a lot faster for me than a PM. I can have it open as a different window and just keep Blabbing instead of getting the PM pop-up every time I get a new message.

If it does go away, I'll get used to not having it. But...I do really like it.