In business startup, complexity is your friend. The harder it is to start your business, the less likely a competitor can follow in your footsteps. Embrace and welcome it, provided that you have the competency, resources and support to push through it. It’s the dip that makes your venture valuable.
Once your business is up and running, complexity is your foe. A complex business model, website or sales process will confuse, dissuade or frustrate potential customers and limit your plans to change the world. Destroy it. To this end I recommend a great speech by Bill Gates on never surrendering to complexity, courtesy of Presentation Zen.