Here's what I'm trying to do: Align two groups together edge-to-edge. The edges are not horizontal or vertical, so Affinity Designer's snapping tools have no effect.
In Freehand, the cursor could snap to any point, even if that point were embedded in a group. The group could thus be dragged by that point without ungrouping it. Said group could then be aligned to another group (by snap-to-point), and the two groups would be exactly aligned
Most of my work involves drawing 3D cutouts models of aircraft. To create a wing, I draw the bottom half of the wing. The half (with all its seams, insignia, control surfaces, and other detail) is duplicated, flipped, and then aligned with the leading edge of the bottom half. This allows the wing to fold over on itself. Because this leading edge is always at an angle, regular snap features don't work.
Note that not even Illustrator will do this. I have yet to find a modern illustration program that can do what Freehand could accomplish ten years ago. Illustrator experts have simply told me to zoom wayyy in and then eyeball movement until the two points are close to each other. With a Freehand-style snapping feature, I could move an object onto another and know they were exactly aligned.
If the action-center for Flip and Rotate could also snap to a point, this would make the rotation a lot easier as well. At present, rotating a wing half by its center or corner would misalign the edge.