After decades of globalization, everyone is just extremely dependent on everyone.
I think hardware is a bit complicated by the way. A lot of hardware is also not US controlled. For instance ARM Holdings is British, Japanese, or global depending on how you look at it and quite a lot of vendors rely on ARM's reference designs. Europe also has a lot of important chip designers, but they are more focused on embedded systems and support chips, like NXP and ST Microelectronics.
"Only services" covers a lot of critically important things. Clouds services and payment systems, for example. Even just one American company like AWS could turn off a huge chunk of European economies.
Why European governments and increasingly companies are trying to move away to European alternatives. It all starts small, but e.g. a bunch of governments are already disentangling from Office. The sale of the maintainer of the Dutch DigiD infrastructure to a US company has been blocked (would have happened without any blockers a few years ago). Countries are reducing US arms purchases in favor of European alternatives.
It's like turning a mammoth tanker, but it is slowly happening.
Let's just hope we have critical mass before the right-wing populists take over, big tech has been intensively lobbying them in recent years [1]. So much 'for the people', like they always proclaim.
[1] https://www.brusselstimes.com/1916422/us-tech-giants-allying...
Arm is important, but for R & D. The impact of not having Arm will take a long time to be felt. The same for a lot of the others you mention. Not having a supply or Intel and AMD CPUs would be felt much faster and would be harder to find replacements for.
> It's like turning a mammoth tanker, but it is slowly happening.
Is it really happening? As has been mentioned on HN multiple times the EU's age verification app will only run on American controlled devices. Some countries are moving some things away from US suppliers, buts its very much one step forward then two steps back.
> Let's just hope we have critical mass before the right-wing populists take over, big tech has been intensively lobbying them in recent years
Unfortunately, not only them. As the article says the existing European Commission is already going in the direction big tech want, just not as far. The current British government (a historically left wing party) has also been cosying up to big tech. One of the organisations mentioned in your link has a lot of info on EU lobbying in general: https://corporateeurope.org/index%2Ephp/en/lobbying-the-eu