Inkscape adds a bunch of metadata to it's svg's, but also has a "Simple SVG" save-as option, did you try it ?
I did try it. Apart from metadata there are two other major problems: it generates a lot of unnecessary attributes with their default values, and also the floating point errors I mentioned. The latter can affect the appearance of your graphics on your screen unfortunately, i.e. a vertical line with X=10 is one thing but X=10.035 is another.
Re:Inkscape Version 0.92 is Released
by mixmastamyk on Wednesday January 04, 2017 @01:06PM
(#13320531)
Optimized SVG is the one you want.
I basically just bought Affinity Designer as a knee-jerk reaction because I disliked Inkscape so much.