-How may I determine what the point of intersection between two lines, lines and surfaces and two surfaces are, instantly (I want something better than using the distance Measure tool and
my on triangulation), even when a line of intersection is a curve of some kind? How may I use a "snap to" intersection detection tool, for when there is no vertex at the location of intersection? Can this intersection tool create a specific point at the location of intersection for me?

-How do I convert between Grease pencil and a path (or series of paths) or bezier, and vice versa? Particularly when one edge is part of a plane or solid already,
and I wish to update one of these already, in place (hoping that this edit in place is possible)?  I particularly seek such a point generating intersection tool if my next question doesn't have an addon implementation either.

-How may I use the knife tool to do curve cuts, and not just straight lines?