Foundations change (tensioned slab, etc) and water inside of houses (copper vs pvc vs PEX vs lead). Electrical is even in frequent flux under those timescales. Insulation as well.
But the concept of water being fed through pipe, from a reservoir, chlorination, etc have been around a long time. Sure implementation details change, but they and the concepts they build off of have been around. You mention pvc, copper, and pex (lead is over 50 years old and many have been replaced). Those are just materials. How do they affect end user on a daily basis?
How long has electrical be 120v AC? How long has auto voltage been 12v vs 5v?
Details, materials, and implementation change (building off of prior versions), concepts and overarching system designs are slow to change.
kortilla|4 years ago
Very little stays consistent…
giantg2|4 years ago
How long has electrical be 120v AC? How long has auto voltage been 12v vs 5v?
Details, materials, and implementation change (building off of prior versions), concepts and overarching system designs are slow to change.
throwaway111023|4 years ago