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US sues Apple for illegal monopoly over smartphones
(www.theverge.com)
This is a most excellent place for technology news and articles.
Even without the DMA, the EU and US have very different judicial systems. I'm not a lawyer, so I don't really understand the specifics, but if I had to describe it in a very hand-wavy fashion from my anecdotal, non-scientific experiences, US courts are more likely to favor preserving individual/personal freedoms over the common public good, and vice versa in the European system.