[ygra]

Ironically we found that IE had the best SVG performance for quite a while (by now the others have mostly caught up). And then they broke a lot of things behaviour-wise in Edge again for quite some time. Performance was still great, but if your image doesn't look like it should it doesn't help.

[abritinthebay]

True, though I’ve often found you have to be doing some rather obscure or strange things to screw up basic display

Or advanced CSS.