In favor of what? I’m all for economic nationalism, but you have to have competitive home grown alternatives. Does Europe have them? Or are they going to shoot themselves in the foot productivity-wise by boycotting the best products?

Look I am all for Euro-skepticism, but "boycotting the best products" on an article about Microsoft Teams which is well known to be clawing its way into companies despite very negative feedback due to advantageous pricing when you are integrated with Office 365 (which is itself monopolistic behavior). Is not one.

The reality is that chat apps nowadays have little moat, blocking the worst offenders for sovereignty's sake it perfectly logical.

In no world are Teams and Zoom anywhere close to the "best products". They're awful, and only persist because of network effects or because of "the people who buy it don't feel the pain".

The best products like Microsoft Teams? Let's be honest, a lot of the software they've replaced has a checkered past

This is a great reason to invest in open-source software.