Comments on https://lichess.org/@/hollowleaf/blog/chessboard-magic-16-release/wOFJ7rld
I see that Chess Tempo visualizes openings using a sunburst graph:
https://chesstempo.com/blog/40/new-opening-trainer-features
I assume that being able to see my opening win-rate in such a manner could be useful for finding holes in my opening repertoire.