I'm not sure they're all that simpler, the basic plumbing probably hasn't changed much, it's just that modern fabrication tech means you can hide all the complexity inside
I'm not sure they're all that simpler, the basic plumbing probably hasn't changed much, it's just that modern fabrication tech means you can hide all the complexity inside
A single metal piece that contains plumbing inside it is simpler than a metal piece with attached pipes for that plumbing.
In this particular case maybe but in general I would say it is the other way round.