Thanks for the response, I think he must have meant that the performance slows the phone to a halt, or overheats it, when the animations aren't done on static svgs wrapped in divs. I've been searching on this forum and found several posts, even some by you, that also repeats his instructions to put SVG's in divs and animate the divs, rather than directly animate the svgs, to improve performance on mobile. I guess the question is how important this really is though.