When we have an answer to the waste, we can talk about efficiency.
On nuclear build up timelines, and remember we cannot be rushing it, because we do not have answers to the fuckups and risks and waste, a build out effort like we did for fossil fuels would combat the problem as well and would have the benefits delivering for us a very long time.
Besides, tons of people need work. So we put that work out there, many families see higher standards of living and mere mortals can do the vast majority of that work too.
Yes, because we have plenty of other options that are cheaper and don't burden future generations with a huge radioactive mess.
Of course we might have to reconsider if everyone should commute to some pointlesss office job in an F150 every day... And pergaps having as much electricity available as you need at a fixed low price is also something that we might just not be able to provide without ruining the entire planet.
Yes, because climate change does not pose a threat to mankind at all, we should waive for the most efficient weapon we have against it.