Wouldn't know why, TBH.
And, don't take what i wrote too serious. Just ranting a bit about the ranting. And, about the fact that people always expect so much. Open sourcing it is the salvation, and then everyone complains about bugs, speed of development, or non-existant support. While very often the last final/stable/whatever release works well. Not talking about you specifically, just what i see in this thread.
TBH, when i saw that this is Open Source'd, i expected… nothing. Because i know the way it often goes with free Open Source projects. I know them from Linux and the Windows world. Except for very few examples, there always was much more manpower, and speed in development, when it's a payware, preferrably with a bigger company behind it. What i expect will happen with Surge is that some Linux freelancer picks it up, and we'll see something like ZynAddFusion/ZynAddSubFx. Or it'll be abandoned all along after a while. Not because i'm a pessimist, but, because i know what happens with most of these small Open Source projects.