They can all be retained, but it is a pain in the ass with the adapters.
The one reason never went for that Advent, they had most of the functions, but not even the bluetooth integrated with the factory mic. I also have rear seat entertainment, and it didn't have that funtion at the time, either.
Mine is Bose, so it is even more complex. Just going to the aftermarket amps made me get the adapters, etc to retain chimes.
I am making one last crack at it this spring, when I add the Rockford Fosgate 360 that I bought a year ago

and a seperate amp for my sub in place of the 5 channel PDX.
If I can't get everything perfectly the way I want it, I am going aftermarket. It is great sounding, but there are a couple of little quirks that I don't like.