My inner designer supports hamburger menu because they can be designed soooo pretty - just look at all the dribbble shots (actually don't look at dribbble for UX related matters). But, unfortunately, it doesn't work for the user that good!

#It's not discoverable
Not only many users don't recognize the hamburger, it also slows down the task completion process.

Here are just a couple of articles relating to your question: https://www.nngroup.com/articles/mobile-navigation-patterns/
https://www.nngroup.com/articles/hamburger-menus/
But there are literally thousands of articles supporting this claim.

#It's hard to reach Hamburger menu is usually located on the upper left-hand side, but only 10% of the world population is left-handed (according to Wiki). And as the screens gets bigger, it's getting a lot harder to reach that part of the screen. Which, again, slows down the task completion time.

My inner designer supports hamburger menu because they can be designed soooo pretty - just look at all the dribbble shots (actually don't look at dribbble for UX related matters). But, unfortunately, it doesn't work for the user that good!

It's not discoverable

Not only many users don't recognize the hamburger, it also slows down the task completion process.

Here are just a couple of articles relating to your question: https://www.nngroup.com/articles/mobile-navigation-patterns/
https://www.nngroup.com/articles/hamburger-menus/
But there are literally thousands of articles supporting this claim.

It's hard to reach

Hamburger menu is usually located on the upper left-hand side, but only 10% of the world population is left-handed (according to Wiki). And as the screens gets bigger, it's getting a lot harder to reach that part of the screen. Which, again, slows down the task completion time.