No idea whatsoever, besides us all noting TASER rounds are fantastically more expensive, i.e. I suspect we'd not be surprised if most officers in the nation have practiced firing 1 or 0 rounds. As an (fire-)armed citizen, so called "less lethal" weapons are not particularly practical to cart around, or wield while checking out a bump in the night while also carrying a flashlight, so I have not seriously studied them and e.g. the way they're deployed and used by police.
They're still potentially lethal, so as a citizen without all the protections police have I might as well use the most effective means of self-defense, I'll be judged the same if an adversary dies and very likely if not. Especially since I'm not expected to intervene in situations like the police are.
On the other hand this has little to do with the Fruitvale Station incident, the error there was in drawing the wrong weapon and not recognizing that before pulling the trigger (when I looked at the officer's face his expression of horror was very clear).
It could be addressed by simply putting it in a hard or very strange place to draw from, so the muscle memory of drawing the two is sufficiently different. Even a waist cross-draw with it located on the non-dominate side of the body, since it's less lethal, and wouldn't be effective at all again body armor, weapons retention is less of an issue. That was my first thought after seeing the incident (well, there's also second guessing the decision to escalate the level of force used, but I didn't seriously consider that; again, as a civilian, all this will never come up).