I'm on hyprland (which also has a scrolling layout). How do you guys navigate between your workspaces? I'm accomodated to super+<num>, which jumps to workspace #<num> with a mostly fixed purpose. If I opened something ad-hoc, I usually know where I placed it. I found it difficult to operate in a setting which more resembles the state of my desk (if it weren't random access).

Super+side mouse buttons, which also works because niri workspaces are vertical. Also my right hand is always on the mouse.

Exactly as you do. The thing that's different at first is that workspaces are organized vertically rather than horizontally, but I for one adapted to that really quick (coming from KDE).