> That cooperation requires a certain amount of communication skills (apart from stellar technical skills), but it doesn't mean that you have to be an extrovert.

There are many people (including myself) who can operate quite successfully in the text-based world (Slack, email) and collaborate that way.

I think Slack (and other tools like it) helps the introvert be a more active participant or even a leader in certain technical discussions. Most especially, the ones where the servers are melting down.