the Noto fonts currently support well over 110,000 characters. Many fonts have more than one glyph per character, which is necessary for correct orthographic rendering (for example, there are 4 glyphs per each Arabic letter). For many scripts, there are both sans and serif variants of the Noto fonts, often in multiple weights and sometimes widths. I think the whole Noto project is easily well over 1,000,000 glyphs. The downloadable fonts take up over 1 GB, and font structures are quite well compressed. In a TTF font a single point takes about 4-5 bytes, but in an SVG it would take more than 10 bytes.
So the SVG graphic you're talking about would be easily 2-3 GB in size, and I think most SVG renderers would fail trying to display it. Even if each glyph would be rendered at just 16 px height (very tiny, most glyphs world be barely recognizable), such a graphic would take up over 100 typical HD screens. If you'd print all the glyphs on paper at 12 pt, very densely packed, you'd get a 2 meters x 2 meters sheet. If the glyphs had some spacing and were at some recognizable size, it'd be more like 3x3 or 4x4 meters.
Is that the type of thing you're interested in? A 3 GB-large SVG that you need to scroll over a 100 screens and, when printed, would be a car-sized poster full of tiny character shapes?