I only ask because oh god is this actually happening?

I will be finding out shortly...

Hurry back when you know

I can only imagine that since .cwp is a proprietary file format, the only way is to export your files from Sonar in a way that can be imported by another DAW, such as '.wav' and '.mid'.
 
In most cases the recommendation for file exchange is to bounce to stems.
 
Sonar can export to OMF (Open Media Format) files, but not all DAWs can read this format.  The online Sonar user guide covers this.  Just search for OMF.
 
These are the limitations of OMFas  shown in the user guide.
 

Note:  OMF files save the following:

Tracks
 
Clip positions
 
Slip edits
 
Fades and crossfades (as destructive edits)
 

The following information is discarded:
 
Volume
 
Pan
 
Automation
 
Effects

Currently installing Studio One on my test PC so will be testing while awaiting response from Studio One forum. Also will look at registry and see how the plug-ins are being recorded and write code if required so I can check against what was installed in SONAR. 

everything can import wav / midi , so take that route.
 
you can even midi sync 2 machines..
 
thats why I always tried to stick with stuff vst wise that you could use multi format.
 
and if you can't bounce the audio effected / un-effected

ProjectScope will analyze your '.cwp' files and show all of the tracks, plugins, and audio files in your projects.  Plus you can preview the audio tracks in the UI.
 
It functions like a file browser that you can scroll though your Cakewalk Projects folder, that shows the objects within the project.  Should be a very handy tool in times like these!  I just tried it again and it works with a Cakewalk Project file created in the latest Sonar Platinum (2017.10).
 
http://forum.cakewalk.com...features-m3584169.aspx

Unfortunately S1 did not support OMF or AAF last i checked

This is going to be a painful transition no matter how you do it. I'm trying Studio One right now and if it works out I'll export my tracks as individual wav files and import them to S1. I have almost an album's worth of songs that are "finished" but not mixed/mastered, because nobody is waiting for them, so I mess with them every so often. Now that Gibson/Cakewalk is forcing my hand, maybe the smart move is to do final mixes on all of them while SONAR still works, instead of transferring to a new DAW and trying to match what I've already spent lots of time on... 
 
PS: To the OP, I don't think there's a simple or automated way to make the move.

When I switched over 3 or so years ago I use to just export the midi and audio tracks and get out the trusty old pen and paper and write down any relevant settings, routings whatever, what plugins were used and their order for each track/buss, and save presets like Song bla bla Guitar, Song bla bla Lead . . . Bass . ..  drums etc etc to, it was a pain in the butt, but once done it's was done.