Yes and no. I still think it's necessary for what I have to do. I have to create notes for contemporary scores, where it is very easy to have images around the fragment of the staff, in addition to the notes. Therefore I need a tool for making this kind of notes, where the "score" part is, let's say, 50%. Think for example at clarinet or flute scores, where multiphonics or special sounds together with special fingerings have to be used. Normally, an image of the instrument + fingerings + other special symbols has to be attached both in the score and into the notes on the initial pages. Of course there are some prebuilt objects for this ( https://lilypond.org/doc/v2.22/Documentation/notation/woodwind-diagrams
), but I think it's much better to have a tool for making your custom images, because the shape of these symbols much depend on your particular score, there's not a shared standard. And these images require paths and nothing else, they are pretty simple: therefore the set of commands provided by LP cover completely their concrete drawing on SVG. Just pick a raster image as a model, then draw paths above its shape with Inkscape, then convert these paths to LP paths. Then my notes Will be a mixture of a \score part, as you suggested, and a "path" part made with the procedure I explained.