The InLight EMR is not intended to replace AC but is an alternative product. The way John Squire explained it, AC under PriMed is now expanding its products from just AC to AC, PM, and InLight.
I was surprised about the portal issue as well. Evidently there's more to the story than is on the CMS website. It would be helpful if the folks at AC who are dealing with MU could post some further information for those of us who haven't yet walked away from MU in total frustration.