This would allow them to fit under an umbrella better when festival taping. I could also see an advantage using them with figure 8 caps if they were available for the sms2000's.
Bingo, for us, that's the big one right there. You can also achieve tighter spacing with bigger angles and avoid stacking the bodies (point the bodies straight forward and angle the caps outward).
Also, if you used RA stubbies (that were custom made to exit a certain direction), you could use the bodies in Rycote's Stereo Suspension mount or the Schoeps AMS22 and run them that way (ala 2 kwonbars stacked). Useful if you want to cut down to just one shockmount.