1950s 1960s–70s 1980s–90s 2000s 2010s 2013–2016 scope and resolution, simultaneously assembly → languages algorithms memory → GC architecture hardware → cloud distributed systems deploy → CI/CD feedback loops environment → containers system topology and the detail within intent → AI ? registers · addresses malloc · free provisioning · racks build · ship mechanics env config · manual ops automate a layer → resist → prove good enough → think higher every time, experience became more valuable — not less seventy years of learning to think at the right level what do we now have the capacity to think about?