I was trying to make an independent point with that "coincidentally ...", sorry if that was a bit unclear. In this case, the takeaway would be "we still don't

I was trying to make an independent point with that "coincidentally ...", sorry if that was a bit unclear. In this case, the takeaway would be "we still don't know how to make secure browsers even though we're trying our darndest." But also, that exploit chain is limited to a single machine; there's still some opportunity to limit damages on a larger scale.