That's more or less the level of wrong that deepstack is. The Big 5 Personality Inventory is probably the most robust, reproducible piece of psychological science we've got, and while there might be arguments that it needs more nuance in places, the bare existence of introversion and extraversion as traits is not even slightly in question in the scientific community.
Your feeling that it might not be true—or that I'm "overly confident" in its truth—just doesn't hold up to decades of scientific consensus.
Gravity can be measured more objectively than social science (such as psychology) concept such as introvert/extrovert, which is determined by committees such as DSM IV or maybe now V. Introversion and extraversion are just one thing that is measured within a certain context.
The article is a bit short on how "introverts" can improve their interactions, but it would surely help to not label people inside these limited buckets and push everyone to communicate and interact with others better.
If interest rates are zero, that's a good deal. If rates are 25%, that $1 will almost get there on its own in a Treasury. A good deal in a low-rate environment is a bad one when rates, the price of money, are high.
* https://docs.aws.amazon.com/AmazonRDS/latest/PostgreSQLRelea...
* https://docs.aws.amazon.com/AmazonRDS/latest/AuroraPostgreSQ...
ML algorithms get a lot focus and hype. Data retrieval, not as much.
The knobs to turn off each of the 4 things I just listed are found in 4 different places within the UI.