The advantage of the furnished plastic stand is that it allows the flash to stand up alone on a table top.
But for a light stand, there are many better choices. My strong preference is the Stroboframe 300:
stroboframe 300 shoe | B&H Photo Video
These two choices are the same shoe, both very usable, and it holds like a vise. Both have the metal 1/4 inch treads in bottom. The "general purpose" choice includes a large knob, usable in some situations, remove it on a light stand. The other choice includes a bottom pin to prevent it rotating on a flash bracket, which is easily removed for use on a light stand instead.
The SB-900 foot was slightly thicker than some, and not all brands of shoes will accept it. The Stroboframe shoe will accept it.