Had to google Qt and SVG, not familiar with either, didn’t find Qt but it
did tell me that SVG is for vector graphics using xml. So the problem there
is I am way to old to bother with xml, always considered it to be a
reinvention of the wheel.
My experience has always been with engineering, either mechanical or
electrical/electronic. So limited exposure outside that world. Hey when I
did my first post school training in electrics we still used set squares
and pencils to do our drawings (0,0) bottom left :).
I am so old I used a slide rule and log tables to do maths at high school!!
I am not so bothered with the ±Y thing but I do miss the ability to move
the origin.
Yeah, it’s a little like “programmes” versus “programs”. 
It seems a little odd, but many of us are able to re-program our thinking (or is it “re-programme”?) to deal with it.
Back in the mid 1990’s I was in a digital signal processing (DSP) class that included a section specifically for image processing. I recall the text using the “top-left origin, positive downward” convention for that section.
You’ll have to work harder to pull rank, or one-up, the folks on this Forum. The yellow, aluminum, Pickett slide rule lived in my shirt pocket for at least a year after university graduation. Same story for the log and trig tables - I liked a copy of “CRC Standard Math Tables” that my father used in the 1940’s, because of its compact size. And the two-term, university “Technical Communications” sequence (part of the core requirements for all engineering and physical science majors) was primarily a drafting course based on pencil, paper, drawing board, T-square, etc.
Dale
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Ah, the good old days, I guess we are lucky we can remember them. Young engineers in the office I last worked in did not know what a slide rule was. As for Kicad and its quirks it is all relative isn’t it. Over the last few weeks I have installed Kicad, managed to learn enough of its functionality to design three small four layer circuit boards and send the designs away for manufacture. In the 1980’s I would have sat in front of a light table with rolls of black tape and footprint stickers and a sharp knife for a few weeks to produce double sized stencils to be sent to the photo lab for reduction to film. Would never of thought of four layers, just not doable at the time. That was when ‘rip up and retry’ meant what it says.
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Just stumbled over my Protel Schematic manual (1989, 230 pages) complete with 5 1/2 inch floppy disks. Low and behold, origin is at top left and ‘Y’ is positive down. So there you go, maybe I don’t remember the good old days.
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My screen was lucky I didn’t had a drink in my mouth just about right now 
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