I don't think we are losing forums, just the current format. Here is an excerpt from the email I received last week.
We've got brand new community forums on the way for you. Once everyone's safely in the "new house," we're going to pause our current forums, making them read-only. After a reasonable period of time, we'll shut down the old forums for good, so go ahead and start using the new ones as soon as they're open for business!