Ben Chestnut, founder of Mailchimp, recently discussed the experience of selling his company and the subsequent feeling of becoming irrelevant.After selling Mailchimp for over $12 billion, Chestnut admitted that he quickly felt irrelevant in the industry.Despite achieving financial freedom, Chestnut confessed that he has never felt less fulfilled.He emphasized the importance of breaking founder habits and finding new purpose, even suggesting that getting a dog can be helpful.