edit - honestly not a troll. is it the specific formatting of "em" dashes? i know for sure we use them all the time. or at least i do. but they're just dashes to me, so..
I may be using both unwittingly. Many programs on desktop autocomplete two dashes with a long dash (not sure which one) and on my mobile keyboard I use it reflexively and I think the easiest is the Em dash because I don't have to move my finger after the long press. It's such a small visual difference that I always forget which is which.
In English, en dashes are for ranges like between 2.5–7.5, or from Feb–July. Em dashes are to show connective thoughts, is it truly different in German or just your preference?
We use En with spacing for thoughts, interruptions, and apparently can also be used for ranges (recommended by standards, but a popular spelling source has ranges without spacing, sometimes used with reduced spacing).
The AI models I’ve seen DO put spaces before and after the dash—that’s how I’ve been able to suss out LLM posts in the past. I never put spaces because it’s WRONG!