LeadSled 
I know a shed load more [real life design and application] about ATM than you think you know
The original link was provided by
mjbow, which as per standard operating proved to be less than half the story.
Which raises another interesting point. You and
Mr Smith bang on about how simple the US system is. I would observe that not only is the mapping [for VFR] a mismash of complexity [granted most is unavoidable due infrustructure proximity, and airspace complexity] and opportunity for error, which cuts to the very heart of the 'mitigations' put in place i.e. wall to wall ATC to catch aircraft [VFR outside the system], and protect IFR without bringing the whole system to a stand still [lets not even consider talking about the size and real cost of the IFR flow management establishment]. This is principally why the US utilise Class E with PRIM and SSR surveillance.
Add to that the number of legislative parts dotted here and there. It would take quite some convincing for anyone operating ATM systems to believe the US suite were a simpler system.
And, before you go off on another unrelated sermon of how good you were 'in the day', I am commenting only on the 'airspace and related' systems and rules. Not aircraft maintenance and the like.