In Cubase 11 on MacOs the smooth scrolling appear (I’m with Magic Mouse):
1 - when you “scroll” vertically and horizontally with the mouse WHEEL (up/down and left/right);
2 . when you click on the ruler bar and “drag” up or down for horizontal zoom
In these cases the graphics transitions are smooth and not framed anymore.
This behaviour is valid in the project window and in the editors (Key, score, audio…). Also the Media browser now scroll smoothly but ONLY in sound packs and plugin pictures views, NOT smooth, instead, in the loop/media list.
We don’t have smooth transitions when:
1 - zoom with key commands (G, H, cmd+G, cmd+H), this is normal because keys are step;
2 - zoom with cmd+weel (horizontal view)…this could be enhanced for sure, Cubase lacks also the vertical zooming with mouse weel.
The video posted by @avavav seems to show only zooming with keys.