[thrw42A8N]

What this guy describes is social anxiety, not introversion.

[0xEF]

I mean, lets also avoid pretending there is zero overlap. I am an introvert largely because my brand of social anxiety causes me to function better in typically introverted ways. Introvertedness is a spectrum as opposed to something with clearly defined boundaries.

[thrw42A8N]

There is no overlap, it's two different traits, both of which are a spectrum. You can have full social anxiety while not having any introversion, and vice versa. I am introvert very much and yet I have zero social anxiety.

[AbstractH24]

Would it be fair to say “You are an introvert by necessity rather than by choice”?