Solar power expected to dominate electricity generation by 2050—even without more ambitious climate policies::In pursuit of the ambitious goal of reaching net-zero emissions, nations worldwide must expand their use of clean energy sources. In the case of solar energy, this change may already be upon us.
Money. Why spend x extra dollars when you don’t have to?
I think California has a new law that mandates this, but until their is loud and constant consumer demand home builders are going to continue doing the bare minimum.