Comment 6 for bug 171283

Are there any features included in "Plain SVG" which are not
part of SVG Tiny/Mobile? If you could identify specific
features which are causing problems it might be possible to
adjust what is there now and let you get on with your work,
and leave SVG tiny for later.

There is definately interest in implementing SVG Tiny and
were proposals to make it the target for Inkscape 1.0 (no
idea when/if a stable 1.0 release will happen though).
It may already be included on the Roadmap, you might want to
check out the website.