Hello,
 
How about adding a Multi-Instrument modular environment as in Studio One http://www.studio-one.expert/studio-one-blog//whats-new-in-studio-one-version-3-multi-instruments Or Patcher as in FL Studio. http://www.image-line.com/support/FLHelp/html/plugins/Patcher.htm The Sonar Modular Environment should be able to freely host VSTi’s and MFX’s.
 
An additional VST modular environment must be added to host VST fx. Modular environment offer great creative flexibility in routing so I hope that the folks at Cakewalk seriously consider this proposal.   

Maybe that is what Workspaces will do?
 

Workspaces

 
The future of workspace customization is coming to SONAR this fall, with innovative options that let you adapt SONAR to your unique needs and workflow.
 
Found here:
http://www.cakewalk.com/Products/SONAR/Rolling-Updates#In-The-Oven

patm300e
Maybe that is what Workspaces will do?
 

Workspaces

 
The future of workspace customization is coming to SONAR this fall, with innovative options that let you adapt SONAR to your unique needs and workflow.
 
Found here:
http://www.cakewalk.com/Products/SONAR/Rolling-Updates#In-The-Oven

I hope that you are right but my feeling that Workspaces is not a modular environment.
How I wish I am wrong!
 
 
 

Hello Pat,
 
 
Looks like FL Studio refers to their modualr environment as "workspace"
https://www.image-line.com/support/FLHelp/html/plugins/Patcher.htm 
"NOTE: The workspace is resizable, drag on the window to resize OR drag an object to the edge of the workspace to auto-resize."
 
So you may very well be correct. 
Wow, really good news!