Why not load VST midi plugins in MFX bay in Sonar - VST and DX effect load in the same bay

It's been forever necessary to load DX effects and VST effects on the same track - why not VST midi plugins too on midi tracks?
 
Puzzling to me that this is not as self evident.
 
 
If you like the idea, please vote:
http://forum.cakewalk.com...-MFX-bay-m3170173.aspx