emwhy
 FYI when doing an install of 64 bit SONAR it will create a Cakewalk folder with a vst subfolder in the x86 folder tree whether you use 32 bit plug-ins or not.

Yes, I noticed this too.

I am still keeping my 32bit SONAR install (and all associated 32bit plugs) up to date.
 
AS far as 32bit only plugs I have the following left that may or may not ever become 64bit.
 
AcmeBarGig - Head Case
Buenoise Plugins - Metal 1 & Rock 1 drums (I've only used Metal 1 on one song, never used Rock 1 yet)
The above plugs use the same dev platform that has yet(?) to become 64bit AFIK.
 
Empress Plugins - Empress Tremelo 
Voxengo - Boogex
FerricTDs
The three above plugs were only used once in a collab where the track was sent to me using these
 
Bill Wall Plugs - LimitX and BoostX (I REALLY LIKE THESE PLUGS but they are wonky in X3)
Elevayta Boys - SpaceBoy (I have a 64 bit alternative but i just find this one easier to use)
PSP Audio - PSP Nitro (not sure if I ever used this one or not)
SampleTank 2.5 - DO NOT get me started on ST3. Very soon I will be uninstalling 2.5. End of an era.
mda_leslie & VB3 - I have alternatives.