The intersection of probabilistic optimization and timing based side channels is a gift that will never ever fully go away. Everything _really fast_ which is a

The intersection of probabilistic optimization and timing based side channels is a gift that will never ever fully go away. Everything _really fast_ which is approximately any very mature systems gear has probabilistic optimization in it now, and that's where a great deal of modern performance comes from. Even thermals and power draws produce side channels. Eradicating every side channel is untenable, research is required to understand what side channels are tenable, then we have to patch them up as best we can. I'm waiting for the one where we find that binning is involved in an integrated way, and that some arbitrary sub-population of popular chips turn out to much more exploitable than others due to particular paths being disabled and leaking extra timing info. That'll be a really fun and awful day.