I think most "believers" in cryopreservation would agree that it's a long shot. Even if restoration is theoretically possible, a lot of things need to line up

I think most "believers" in cryopreservation would agree that it's a long shot. Even if restoration is theoretically possible, a lot of things need to line up for it to actually happen for an individual. But as you say, there's a significant difference between unlikely and impossible (which I'm going to assume is what was meant by praying to Zeus). The hard drive probably has rather better chances than the frozen brain though.