The 10m interview (video) embedded on the article was a great watch (no toothbrush mentioned). https://www.wsj.com/video/series/in-depth-features/how-dysons-fo

The 10m interview (video) embedded on the article was a great watch (no toothbrush mentioned). https://www.wsj.com/video/series/in-depth-features/how-dysons-founder-picks-what-to-invent-next/ED1EC696-1827-4837-8F07-92A1B41230DC https://www.wsj.com/video/series/in-depth-features/how-dyson... I found it educational on product development (as a new startup founder/product developer myself).