30+ year approach? Where is that coming from? The median construction time for a nuclear reactor is 89 months, or 7,5 years. And it's not like we are only going to need it now either, our civilization is going to need reliable power sources for the foreseeable future, so why settle with alternatives that can only barely cover our needs now and need to be replaced with fossil fuels when not available, when a much cleaner option (that being nuclear) remains a possibility?
The wind always blows somewhere. Diversification of locations across a country or ideally across Europe minimizes reliability issues.
That somewhere will also need power, though. Not to mention, building interconnections across nations is an arduous task that requires time and financing on its own. According to the European Commission the current objective is reaching a 15% interconnection capacity by 2030 (meaning every member state should be able to export up to 15% of its capacity). And only 16 of 27 countries are on track with that objective. Sure, going forward with this will be great and very much necessary, but we cannot rely solely on interconnections, even when thinking 10 years from now.
Let's take last night as an example: here are the electricity map data for Germany. At midnight, despite having an enormous renewable capacity installed, the wind was evidently pretty low and of course solar was of little use, so they still had to fire up their coal, gas and biomass generators.
As this was going on, neighbouring Austria and Netherlands were doing great, with respectively 85% and 71% of their grids being powered by renewables, but unfortunately this wasn't nearly enough for power hungry Germany.
In the meantime, France, despite only using 24% of renewables in its mix, managed to get the 4th lowest carbon intensity on our continent and the 7th worldwide, with a carbon intensity over 10 times better than that of Germany.
The rest can be covered by investment in storage technologies.
Some day, sure. But we need reliable and clean energy now, not in the distant future. So the first step is improving our grids today, then when the technology allows it we can phase out nuclear too, and move to a fully renewable grid. But that simply cannot happen right now.
Let me clarify. It's great on an environmental standpoint, it's quite terrible on an industrial and commercial one. If we are the only ones imposing climate regulation, businesses and industries will move abroad where it's cheaper to operate. I'm not saying scrapping the green deal laws is a good thing, but I am saying that I can see the logic behind it. And it's not because of the evil capitalism either, it's a desperate attempt for European industry to stay relevant on the global stage.