We started building Nano to solve a problem: the SVG images used on our website (embed with <img> tags) are not showing the correct font we've chosen - Roboto. After few rounds of testing and searching for solutions, embedding fonts seemed to be the best way to solve the problem, without ballooning our SVG files size. We've wrote a blog post on how we came up with this solution on CSS-Tricks here: https://css-tricks.com/using-custom-fonts-with-svg-in-an-ima...
We're hopeful our export to SVG feature would have provide LOTS of options to use desktop software or other online SaaS to have continued access to your work. In these days and age, SaaS players must be open especially so with their file formats, and since we want to work well with other platforms, but not reinventing the wheel, we opt for SVG file format, so it can continue to work well with others for many years to come. Hope it clears your doubts :)