The reality is that European solidarity is not ironclad either. Is the US, or Germany, or Sweden more likely to fold and deactivate* weapon systems under nuclear blackmail?
It sounds hypothetical but seriously, what would Gripen do if tactical nukes were dropped on Estonia and Putin threatened the same on Sweden if they didn't back off? I don't know, and you don't either.
*I've not seen credible accusations this is possible, but assuming it is
Those "promises" were meaningless BS. Every European should know that the EU cannot make such promises, because it has no power in those matters. Defense policy is up to the member states, while investments and energy purchases are mostly made by private entities.
The fact that you think that's a big number just underscores how dire Europe's security situation is at the moment. One hundred billion Euros sounds like a lot, but China spends two and a half times that much on defense every single year, the U.S. spends 10X that much every single year, and even the Russians spend more than that every single year. Nevermind the fact Europe needs to play catch up here, not just keep pace.
Wikipedia says Russia spent 100 billion in 2023, so increase of 100 billion should be more than that don't you think? Are you misinformed or deliberately lying?
You have to adjust figures for PPP, or Purchasing Power Parity, due to exchange rate differences. In 2024, Russia's PPP adjusted military spend was somewhere between $300B and $400B [1][2]. Their technology is also vastly superior to Germany's and they have a much larger personnel. It doesn't matter how much you spend if you don't get your money's worth.