The Rocker
I'm anxious to see all what ARA 2 will bring to the Studio version...
I guess that primary problem with ARA 1 was tight integration with Studio One. Sonar has joined the club early, but other have found it problematic (and remembering experience in Sonar with Melodyne, especially early, that was not just ignorance)
Fortunately, ARA 2 is considerably more flexible and can be integrated more easily into a multitude of DAWs as well as supported by a very wide variety of plug-ins.
That has attracted Logic and Reaper. Probably Cubase follow. So I think compatibility was primary target for ARA2.
Unfortunately, I guess that upgrade will not be for free (at least not for Editor and Studio). And I do not exclude Studio One owners will have to pay for Studio One 4 to use it