Not saying you're wrong (pretty sure you're not) but important to remember that the reason LLMs use a lot of em dashes is because it features so prominently in journalism.

I would have little respect for a journalist who didn't know how to use an em-dash, so I don't think that proves anything. But I agree that there is a lack of coherent thought throughout, though that's something humans are also fully capable of.

But yeah, fully agree. Never mind that network connection speed is not really the relevant bottleneck for most office situations these days. If Germans are less productive due to technology it's because they still use freaking fax machines over there, not because employees are stuck with five year old smartphones.

Most word processors will auto-format to em dashes when they detect regular dashes in context of a sentence with a space on either side

Can we please stop with the em-dash bullshit? That's a literary tool, not a sign of an LLM in play. That people did not encounter them ahead of ChatGPT speaks more to their news diet than the ability to be a literary critic.