Almost 12 years ago, a young developer uploaded a prototype of a new way of using the iPad keyboard and it quickly became the most requested feature Apple developers had ever seen. 

On iPads and iPhones, you can hold down the space bar and navigate or highlight text by simply flicking across, something you would previously have to hover over and highlight. This is a quicker and more efficient way of manipulating text. Upon seeing praise for this feature, @DanielcHooper shared an anecdote about his invention of the prototype and his time spent working at Apple.