I just ran into "datalist" and my first impression was "wow, game changer". The behavior is the same across browsers but the appearance is strictly browser-specific. You can't style it with CSS.

Sometimes the list displays the text of the data, sometimes, the text and the "value" attribute. So you are not selecting "Atlanta" - you are selecting "234290780 Atlanta" (the ID and the value).

And with the on-click action, you can't just get the ID - you have to get the whole thing and parse the ID out.

It just seems... abandoned.