SVG upload is not possible in the editor, but it is in the designer.
I have several clients that work from the editor only and are more than happy with how things are going. Only thing that they constantly face is that they can't upload SVG's in the editor.
This means that they have to send the SVG files to me and I have to upload them in the designer which is extra work for both the client and for me.
Should be a simple fix, since it's already supported in the designer.
Insane that this isn't a feature out of the box! I have the same issue