I'd love it if they had a things don't look broken promise for IE9. Seems like it should be relatively easy to sequentially layout the page in IE9 without flexbox?

Is everyone else dropping IE9 support at this stage...

I'm a bit out of the frontend developer loop these days being full stack and learning things like docker or elixir is more fun, and useful, than the vagaries of the latest promise library/CSS Pre processor/awful class naming scheme/etc.