>the complete obliteration of the basic assumption that ‘someone wrote this so it is at least worth a cursory glance’.
The OP is not disputing that a lot of writing already had less than zero value to the reader, even decades ago. So that is not their conclusion.
They are really only saying that problem suddenly got MUCH worse.
You said it perfectly - “All writing now is noise”
I was a little cranky when I replied. What I meant was that this flood of LLM-noise already started around GPT-4.5 for many people. I was surprised to read about this now. But it’s good to have a discussion about it at large, anyway.