Page switching. Shift+2 through Shift+8 jump to any of the seven pages instantly, and Shift+1 opens the Project Manager.
JKL everywhere. J, K, and L (reverse, stop, forward) drive playback on the Cut, Edit, Color, and Fairlight pages, and the Cut and Edit pages both build their fast-trim workflow on top of it: hold K while tapping J or L to step a frame at a time, or press W to enter Dynamic Trim mode.
Node trees on Fusion and Color. Option+S adds a serial node, Cmd+P bypasses one, and Cmd+G groups a selection, the same shortcuts on both pages since they share the same node-editing engine.
One exception to the modifier pattern. Deleting a node in Fusion is Delete on Mac, not the Backspace used on Windows and Linux.