I think that this is something to work on after we get closer to a
switch to Cairo as that would make things a lot easier, as there are
possibilities of using native support options etc.
Whatever we use should be actively maintained outside the project and
high fidelity - I wonder if we could just use libsvg-cairo after the
switch. Whilst these libraries still lag behind Inkscape, they are
great options and we could try and get more interest upstream later.