Here are some published articles about how a knowledge of personality styles is relevant in the 21st century.
Interaction Styles for the Digital Age - BAPT conference 2018
Interaction Styles, Emotional Intelligence and Charisma (2017), Typeface
Interacting in High Performance Teams 2 (2016) Typeface, Vol, 27, No. 2
Interaction Styles Team Working Tips (2016) Typeface, Vol, 27, No, 4
Interacting in High Performance Teams (2015), Typeface, Vol. 26. No.
Coaching with MBTI (2014), Typeface, Vol. 25, No. 2
Coaching for Engagement (2013), Typeface, Vol. 24, No. 2
Social Media – building walls or bridges? (2018) BAPT website
Interaction Styles and the Digital Age (2018) BAPT website