Agreed on points in the article. Would be good to note that using thinner stroke for interior details (and thicker strokes for "important" lines that represent

Agreed on points in the article. Would be good to note that using thinner stroke for interior details (and thicker strokes for "important" lines that represent large depth discontinuities) is also a reasonable design choice (example: https://dribbble.com/shots/1324699-Icons https://dribbble.com/shots/1324699-Icons https://dribbble.com/shots/1329630-More-Icons https://dribbble.com/shots/1329630-More-Icons )–this is pretty common in non-icon illustrations as well.