It must be said that an svgz can be decompressed and manipulated by any svg supporting tool, including inkscape which adds specific tags to more easily edit it

It must be said that an svgz can be decompressed and manipulated by any svg supporting tool, including inkscape which adds specific tags to more easily edit it later. Considering an svg takes a very little space compared to the rest of a project, this won't make a big difference on size. Also, an svgz can be streamed decompressed at the same time it is parsed, so it is not too much of a complexity, processor time or memory even for the cheapest cellphones. I really wonder what is the use case for this format.