From the jump, even without the emdashes, it was crystal clear that this post was written by Claude. I'm sure the OP put their own ideas into the prompt, provided some sources, etc. But reading some of these phrases provoked a pretty visceral sense that I'm just reading an LLM's output:

"The harsh reality" "he perfectly captured" "architectural decisions that make senior engineers weep" "fundamental issue"

It makes me wonder whether a whole class of writing is going to be deprecated because the cadence is just too similar to LLM outputs.

get ready for vibe-writing cleanup as a service...

I've made heavy use of emdashes my whole life. It feels like I have to eliminate them now :(