cinder said:
It's not always the only button there.One of the complaints had been that the toolbar overflows into a new line on small screens. A solution to this was to move some of the lesser-used buttons (fullscreen and note toggle) into that menu on smaller screens.
On desktop, the download button may be the only entry there for now. In the future, we'll add more stuff that may end up going into that menu.
What a lot of sites do for this kind of situation (especially WordPress sites from what I've noticed) is have a mobile version of the toolbar that's hidden on desktop and vice versa. It would be better IMO to have the 3-dot menu hidden entirely in desktop mode and only put those buttons in a 3-dot menu in mobile mode. The buttons are already generally flex containers from what I see so it wouldn't be too hard to implement that.