Beatscape is probably just functional today as it was in X1. I say probably because I stopped using the plug-in some time ago and did not install it on my current machine. While Cakewalk dropped the Beatscape synth in X2, the Beatscape content became the Loops and One Shots installer in X2 and X3. There is no requirement to use the content inside Beatscape. I do not believe the content is bundled with SONAR anymore. Whether the plug-in or content is useful depends on the individual.
AFAIK, all 64bit plug-ins default to "C:\Program Files\Cakewalk\Vstplugins." The location of some 32bit depends on whether 32bit SONAR was installed before or after 64bit SONAR. When 64bit SONAR is installed first, the VST plug-ins which are 32bit only are installed with the 64bit plugins in "C:\Program Files\Cakewalk\Vstplugins" and no 32bit plug-ins are installed in "C:\Program Files (x86)\Cakewalk\Vstplugins." If 32bit SONAR is installed first, all 32bit plug-ins default to "C:\Program Files (x86)\Cakewalk\Vstplugins."
I do not believe it is possible in all cases to tell which plug-ins are 32 or 64bit at the OS level by simply looking at the dlls. In 64bit SONAR, 32bit plug-ins are in a different color in the browser and have
(32-bit) appended to their name. The physical location of a plug-in is displayed by clicking the Details button in the plug-in properties or at the bottom of the plug-in manager when a plug-in is selected in the manager.
R-Mix shipped as 32 and 64bit.