"It’s hard to believe that it’s been 9+ years since we released CCR, LCR and SCR."
Don't want to be that guy, but SCR was released with SP1 which arrived one year later. :)
I remember how fundamentally new the concepts of CCR and LCR were back then, absolutely loved talking with customers about making not only the servers but the data high available as well. Unfortunately CCR and the underlying clustering infrastructure had it's
flaws and was not always as reliable and stable as it should be. The Exchange 2010 version of continuous replication that we now know as DAG added more flexibility and proved to be rock solid.
And for many IT pros Exchange 2007 was the reason they started working with PowerShell. A version to migrate away from, but never to forget.