. Geothermal. Investigation cost $90 million. Kaput.
. Wave-powered generators generators. Both sank.
. Sun Cable to 'power Singapore'. Kaput.
. Snowy 2.0. Supposed to be completed 2021. Estimated cost at start $2
billion, now $12 billion.
. Rewiring 'the nation'. Unlikely to start due to environmental
damage, loss of farming land, and threat to koalas.

Oh no here's another one, and you promised!

On the futuristic scheme of 'rewiring the nation', the Green Left show their hypocrisy once again: they wet themselves over threats to koalas but barrack for renewable energy projects that are a significant threat to koalas.

Vast acres of wind and solar requiring to be cleared for solar and wind. Renewable projects make up 1 in 5 of the threats to koalas now.

It will get worse.

'Rewiring the nation' would involve thousand of kilometres, ripping through the environment - as well as rendering good farmland useless - to get power from these remote wind and solar 'farms' to where it will be needed if the madness continues.

"playing pokies can be a thrilling and rewarding experience." I suppose drinking arsenic can also be a thrilling and rewarding experience, and like pokies just don't drinking too much otherwise, like from pokies, you might suffer acute vomiting, abdominal pain and diarrhoea. Its all part of the wonderful experience!

Pretty dodgy list you've got there, ttbn!
There's disagreement over whether a cable all the ay to Singapore is economically viable or whether it should just concentrate on hydrogen production, but Sun Cable is far from kaput.
What are you criteria for inclusion? I notice you've not mentioned the defunct plan to take advantage of the coal north of Tarcoola.
Is Rewiring the Nation even a specific scheme? It looks like a Labor slogan! But if you mean KerangLink, a lower impact route further west is now the preferred route.

Your list is pretty spot-on ttbn but I'm not sure you can include Snowy 2.0 in it.

If you understand its purpose, Snowy 2.0 was a massive success. The purpose? It was introduced by Turnbull to allow him to kick the electoral problem of rising electricity costs down the road. He was able to say that the problem was already solved by his brand new scheme. That's why it was massively under-priced and over-promised. Not for infrastructural purposes but for electoral purposes.

And it succeeded. Its usefulness has now passed which is why there is talk of abandoning it.