Schrems II is the EU court case that struck down the Adequacy Decision. The heart of the decision is the correct and accurate observation US law enforcement can compel a company to hand over data about an EU individual, and that EU individual has no recourse. There have been a series of court cases since Schrems II which expand upon the logical consequences of this ruling. Short version is, not only is the adequacy decision gone, but none of the other options in GDPR will work either. It is literally not possible to adequately safeguard personal data in the US, because there are no redress mechanisms to improper access from US law enforcement.
There have been high-level talks about "Privacy Shield 2.0," and there were some announcements from both US and EU government agencies about a milestone in those talks. The linked article is making it clear, correctly, that the observable substance of those agreements extends no further than the name "Privacy Shield 2.0" The details of how this agreement will work are important. There is no evidence that such details exist, even in the form of smudged handwritten notes on the back of a used cocktail napkin.
The EU and US have agreed that they would like it if something called Privacy Shield 2.0 were to exist in the future. That's great, I would like that as well. But we don't have one.
This article is content marketing from Simple Analytics. Their marketing spin is that if you're deciding what Website Analytics solution to buy, you should not pin your hopes on Google Analytics being acceptable under GDPR in the near- or medium-term future. As someone whose professional interests mean I pay a lot of attention to both GDPR and Google Analytics, I think that statement is accurate.