> The only context I have is my friend in HVAC from many years ago that went to a school that taught everything manually because they wanted people to have a deep understanding of it. What happens to code in the future when people don't have a deep understanding?

What happen is that their boss gets a 3 page email screed with pictures of how they fucked up the thermostat wiring in trying to gerry-rig a new heat pump/air handler that supports only electric resistance backup heat into my house which has an oil boiler for backup. And I get shit from my wife about why our $10k new heat pump is blowing cold air on her during defrost cycles.