In Ivan Sutherland’s 1994 talk about SKETCHPAD, he explains, “The idea was that you draw the drawing first, and then fix it up later,” (33'38" into the video) by adding constraints, for example by adding parallelism and equal-length constraints. And this is still pretty similar to modern constraint-driven CAD programs like FreeCAD.
But on modern computers, we could imagine a wider variety of ways of “fixing it up”. For example, we could imagine smoothing out a crooked line you’ve drawn, or converting it into a circle arc, or connecting or disconnecting two lines, or cleaning up some text you’ve written, or running handwriting recognition on it. Perhaps buttons would pop up next to recently drawn objects to offer you these opportunities.
This kind of successive approximation to the state you want is not nearly as well supported in current drawing software as I think it should be.