3 & 4, um. I'm thinking "count them on your fingers".
3) the ability to figure out what the hell things are down to a scale of ~50nm. Xray scanners are not particularly common, and most of those aren't going to resolve down to the level where you can recognise components inside a chip, let alone allow you to identify them and spot things that have been added to the original design.
Well, about that 27" CRT that's still in storage for reasons unknown (except to the BOFH ... ).