Counterpoint: I picked it up in high school and I was Not That Bright(tm).
Certainly, some complex instruction-set extensions or sprawling SIMD mnemonics are more challenging that what I was reading in the 90s, but the boogie-man status of assembly is greatly overstated.
The final thesis, that we can-and-should let LLMs micro-optimize assembly into non-statically-verifiable gibberish to save an instruction stacks misunderstandings on top of misunderstandings. Just vapid gold-rush cheer-leading from Wired.