So no costings then ?
All this waffle about double the power systems and how it will wreck the economy and yet you can't put up a number ?
Not one ?
You've got nothing mate. Not a thing.
Next thing you'll be talking about the monsters under the bed.

Already posted how the gap will be filled in my reply to MG. This information has been provided several times but the coal trolls pretend firming isn't coming.
Another little fable of yours is an unreliable grid.
With a distributed grid containing renewables and lots of commercial storage, the grid will be more reliable, not less. The Hornsdale battery is already proving how superior large storage is in response to instant grid stability. Snowy hydro has been demonstrating for decades how well large storage can respond faster than any outdated fossil plant.
And then there's big failures like this.
https://reneweconomy.com.au/fire-at-gas-generator-triggers-blackout-with-100000-wa-homes-impacted-41465/