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by spicyj 4225 days ago
Historically, our interactive diagrams rendered to VML for IE8 support in addition to the SVG used by modern browsers, so we couldn't use any SVG features that aren't shared by VML. We no longer support IE8, but our code is still mostly built around this assumption so it's nontrivial for us to take advantage of any native animation support. (In addition, these aren't animations per se; rather they're cases where we move elements of a diagram in response to a touch interaction, which (I believe) requires JS to power it regardless.)