I think there should be a bottom button right next to the top button
Maybe exclusively for mobile users if possible, but the reasoning is that there is no end key on mobile. (At least not that I can see on iOS Safari)
Yes, I know we are talking about saving a few seconds but it's a serious pain to scroll all the way to the bottom to read new posts on longer threads.
It's pretty clear what I'm suggesting, but just in case:
Post thoughts below.
Thanks for looking.