> Sure, that makes it easier, not harder.
Tell that to the folks actually building these transmission networks.
> Interconnection capacity can be expanded.
Sure. Finland is adding an additional 1000 MW of capacity to Estonia. It's expected to be ready for service in 2035.
In case you didn't notice, that's less than a nuclear power plants worth of interconnection capacity in a decade.
>
https://en.wikipedia.org/wiki/European_super_grid details all sorts of proposals in this regard
That page is little much than fancy hand waving. What's more amusing is that you can also find the summary of a study from Finnish engineering firm Pöyry on the very same page that concludes the following:
"A report by Pöyry stated that a super grid would only partially reduce the problems from intermittent renewable energy production. While it found that spreading renewables across Europe produced a smoothing effect, large scale weather patterns would impact many European countries at similar times. This still results in large highs and lows of energy output."
> some of them currently being implemented.
Which ones? Specifically which ones will add the required tens of GWs of interconnection capacity?
> Like I said, not much imagination necessary; others have already gotten it well past that point.
That's putting it charitably. You need a rather large leap of faith from those hallucinations to a real solution.