The technology certainly exists, though some of it is pretty new and not all of it is mature or commoditized (particularly in the context of high levels of penetration of variable renewables on the grid).

That being said, politics aren't the only reason why it might not be deployed. Capitalization issues, for one, are also common. Additionally, you have to make a judgement call about what you consider included in "politics" -- for example, does corruption count?