EU privacy law is so vague that people routinely 'discover' new impacts of the rules only when some judge pulls them out of thin air. The fate of EU tech firms is pretty much well described above: endless agonizing over how these rules might be interpreted, followed by maximally damaging interpretations, because the nature of such law making is that enforcement is arbitrary.
> Your wild edge case is someone else's life and living.
Yes, the person whose name is mangled by a shitty bank's IT systems. Or the people who can see what a shitty data vacuuming company has on them( that now has to ask for consent beforehand).
Regulations are there to protect people like that, not just for fun.
The article you've linked is obviously biased ( why does it make a point of talking about totalitarian communist regimes and their death toll and not any other totalitarian regimes'? Some of the most infamous and deadly totalitarian regimes aren't communist - Iran's Islamic one, Saddam in Iraq, Hitler, Mussolini). And the argument that totalitarian regimes are bad because they wage war and that democracies can't even execute serial killers falls apart when the US is brought in. I won't even bother with the rest.
The legislation, at least the one coming from Brussels, is nearly always reasonable in scope, extent, impacts, penalties, and tends to strike a fair balance between specificity and vagueness as to allow the courts for some wiggle room for interpretation
As an example, with interoperability, the final legislation might stipulate something similar to this:
* once a software service reaches sufficient market size
* the core functionality of the service must be exposed for interoperability
* any breaking changes to core functionality must allow for sufficient period of backwards-compatibility and deprecation warnings. Exceptions for security breaches or other emergencies
So, for Youtube, this would mean logging in, viewing videos and history. It doesn't mean that every single feature of every single web site must be publicly exposed and be backwards-compatible for eternity