This is super interesting! I'm an INTJ and I remember about 10 years ago discovering the M.B. personality types and my mind was blown. I've also found that time and circumstance can potentially contribute/affect to the outcome, which in my mind always results in numerous questions like:

1. How reliable these types truly are?

2. Are we even able as humans to be 100% accurate in self-awareness and understanding of the self and what our baseline is?

3. How many levels over our lifetime can we potentially cross within the two major spaces of Introvert and Extrovert?