I am not even close to being a Solar doomer, but you need to have more options than just Solar/Wind.

Nuke shouldn't replace Solar, it shouldn't be a competition. Nuke should push coal and gas out.

Solar isn't just about having big empty spaces either, it needs to be located near where people who service it actually want to live. AEMO used to have a policy of not revealing where upcoming solar projects were to be located, leading to multiple competing solar farms, only the first of which would be connected to the grid, the remaining projects being left sitting there doing nothing until transmission upgrades could be completed.

Not to mention, we dont have anything like the battery capacity needed to hold daytime voltage overnight. The Elon Musk battery in SA being famous for supplying a few minutes to hold over a voltage drop from a QLD coal plant failure, while gas came online to support it.

Nuclear isnt as bad as they say for cost either. Every report funded in Australia factors in the sovereign risk that the government might start or permit a project and kill it due to politics.

Theres no practical reason why we couldn't mirror the British rollout, bringing a reactor on every 3-5 years or whatever it was, except that most of those blokes are retired and we would like the british did, build the nuclear industry here from scratch.