Honestly, I would consider it too late if it ready to build the first commercial plant right now. Building one of those takes a decade or two and building them all over the world takes significantly longer as expertise doesn't pop up out of nowhere in as many people as you want and neither does funding happen for plants all over the world as the first one isn't even finished yet.
There's a massive fusion reactor in the sky that we could easily use by turning the radiation from it into electricity or harnessing the winds that are caused by the temperature differences it creates.
Nuclear fusion still has a long way to go, but to slow climate change (already too late to stop it) we need to act now.