Really interesting thoughts. We're all conditioned to think of ourselves as either introvert or extrovert by nature. But of course we are all interrelated with each other and our environments so it makes sense that our degree of introversion or extroversion will morph over time if our situation changes.
Looking back, I certainly feel like I'm less introverted than I used to be. In fact, I think for me my degree of introversion or extroversion now varies day to day depending on who I'm surrounded by and interacting with.