Mmm, close, I would nitpick a few points: - Most users do understand the hamburger icon, so they notice and understand it, but they definitely don't utilize it

Mmm, close, I would nitpick a few points: - Most users do understand the hamburger icon, so they notice and understand it, but they definitely don't utilize it. - It's not really about engagement. Users generally don't go about thinking to themselves "boy that icon looks so engaging and just begs for a click!" - It's all about workflows and hints built into these workflows. At any moment on your website/app your users are trying to accomplish something. UI nudges and pulls them in the correct direction towards their destination. At every step the user is evaluating the screen to determine the thing most relevant to moving closer to their goal. A hamburger button never - and I mean never - tells the user "click me and you'll be closer to your goal!". A hamburger button is utterly neutral in every single way, even to the trained user who knows what a hamburger button does. - When evaluating the screen to determine what they should do next, almost everything feels more relevant than the hamburger button. It's not that people don't want to click on the hamburger button, it's that in any particular circumstance some other UI element will feel more relevant (even if it isn't actually true).