It worked for China because they were in position of power. The US wasn't established in China and they needed Chinese users to grow their global user base and influence. Meanwhile, China had the wealth and power to say no and instead fund and develop their own homegrown tech equivalents.
Europe doesn't have that same level of power. If tomorrow morning you banned Microsoft, Google, Apple, Amazon, Salesforce in Europe, you'd destroy their economy.
What Europe needs to do is create the conditions for tech companies to emerge that could truly compete against US big tech. As long as European will prefer working for US corporation, there's no chance for Europe to compete. Simple as that.
I don't get your argument. Those companies provide overpriced crap to go along with domain specific code that is either open source or written by a more specialized company. If companies suddenly had to make intelligent choices and people would get fired for buying IBM, a bunch if companies would show up with better integrations than these since worse just isn't possible.
If a rush to get anything non-US were the priority the market of converting Chinese solutions would already deliver better solutions.. US tech (of this office sort) looks a lot like US steel plants a couple decades after other nations built replacements, that's why it is comical that Europe is not only using it but often using the very worst of it.
Europe doesn't have that same level of power. If tomorrow morning you banned Microsoft, Google, Apple, Amazon, Salesforce in Europe, you'd destroy their economy.
What Europe needs to do is create the conditions for tech companies to emerge that could truly compete against US big tech. As long as European will prefer working for US corporation, there's no chance for Europe to compete. Simple as that.