If it's not sticky, the user would have to scroll a lot a lot to get to the top of page to do something, say, reading list of replies to him.
-sailor(Ocean & Mountain);
2019-9-25(#12351712@0)
Very few apps can be done with only one hand. Before this new design, your fingers needed to move more to reach those functions.
-sailor(Ocean & Mountain);
2019-9-25(#12351390@0)