I know this is a done deal and Broker is gone, but I want to express extreme disappointment.
I understand that UM, nee, Nirvana, is the chosen direction forward for SAG for messaging since the acquisition of my-Channels and that having multiple messaging tools can present challenges on a number of fronts.
But what do Broker users really gain when switching over to UM? The only major feature I see is active/active clustering – the need for which varies certainly but experience with Broker for the past many years shows that active/active for the messaging engine isn’t necessary for many (most?) implementations.
So now we get to go through the same growing pains we lived through back in the day with Broker. We get to replace the one component that is stable and not the source of any real trouble with one that is less so. Just to get back the functionality we already had.
When my-Channels was acquired, there was an SAG blog post stating “Nirvana was rock-solid, never failed and continued to perform predictably and reliably.” One could have substituted in “Broker” for Nirvana in that and would still be an accurate statement. 
SAG will eventually work through and resolve the issues of IS and UM interactions, the same way the same sort of issues were resolved when IS and Broker were first tied together. It’s just a bit aggravating to have to go through that for no meaningful additional capability.

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