In 1914 Brinton knew that radar charts weren’t very effective. What do you think? Should they be “banished to the scrap heap”? We are still them critiquing today.
As with all “rules” about data visualisation, in 2014 we realise they are at best guidelines. In defense of radar charts, I refer you to this excellent post by Alberto Cairo: Radar charts: avoid them (99% of the time…)
My own personal experience.: one of my all time favourite games, Warning Forever, made great use of them to display Boss characteristics. As you played the game over and over, you became familiar with the radar and could quickly read the sense of the data displayed