By enabling snapping to path and snapping to nodes in Inkscape I can, for example, snap a corner of a rectangle to a line by moving the rectangle towards the line. But it doesn't work the other way ...
I've been playing around with Sketch 3 only to figure out you can't snap to points. For example if you have a shape and you want to draw a line from one point to another, it won't be accurate and snap ...
you see the pen tool does not meet the standard grid
Before the last update Illustrator would give a visual queue when it snapped to anchors. Now it only displays an ambiguous "intersect", and when there's a lot of elements, it's difficult to know ...