I had a line drawing to do...a coloured line drawing. It was quite a complex one, so tracing it in Corel or Illustrator would be hopelessly inadequate. The Inkscape trace -with everything turned up to 11- would just about do it, but a vector file of that complexity would just blow Corel up.
And then it occured to me. Trace it in Inkscape, then transfer it via a BITMAP to Corel. A PNG in this case. Knocked the colour out and traced it at the same time with an adequate amount of detail. Quick too- it's a one-step process.
I've since tried doing the same thing with photos too- it's no Photograv and the results are somewhat stylised, but there's a level of detail that's perfectly acceptable for -say- memorial photographs on marble.
Here's how that particular job turned out. It's the cartoon in the middle...the frame was added clipart. I think I'm going to be doing this again.