I'm no expert, but some of that sounds like it would also be applicable to introverts and people with social anxiety, as well as highly sensitive people generally.
Yes - exactly

So it brings me again to the question: at what point does a sensitive/sensory/quirky introvert step under the spectrum umbrella? On the one hand, do we have to pathologize every behaviour that isn't perfectly typical, but on the other hand thinking "oh, I/he/she could have Asperger's" makes it easier to understand the differences.
I go back and forth with this, for all three of us (DD9, DS8 and myself). I am certain that with today's diagnostic criteria I would have been diagnosed when I was a kid. Now I'm pretty typical (sort of ;p lol) but I've had decades with which to observe and assimilate behaviour...